Stars Galaxies and Cosmology The Astronomical Art of Don Dixon

029-milky-way-galaxy-dixon – Our galaxy rises in the sky of an earthlike world far above the galactic pole. Oil on masonite, 1974.

053-orion-nebula-dixon - an earthlike world, child of one of the young stars in the Great Nebula in Orion, floats near the outskirts of this stellar nursery. This illustration depicts a vibrant, turbulent stellar nursery, showcasing dense clouds of interstellar gas and dust illuminated by the intense radiation of embedded young stars. Glowing filaments of magenta, crimson, and deep blues dominate the composition, revealing complex shock fronts and ionization zones characteristic of active star-forming regions. Silhouetted tendrils of cold, opaque dust lanes cut across the glowing nebula, creating a stark sense of three-dimensional depth and cosmic structure. Acrylic and gouache, 1974.

058-supernova-dixon –a planet melts in the blazing radiance of a supernova explosion ; This illustration depicts a massive, energetic supernova explosion blazing violently in a star-filled sky. Below the cosmic detonation, the scorched surface of an alien world is shown covered in churning, molten lava domes and a highly excited, glowing orange atmosphere. The radiant energy from the cataclysmic stellar death brightly illuminates the planetary horizon, casting a harsh light over the searing landscape. gouache on illustration board, 1976

Sagittarius

078-sagittarius-dixon – This illustration depicts a wide cosmic vista focused on a dense, reddish-brown band of the Milky Way star clouds towards the Sagittarius constellation, rich with clusters and dark nebulae. In the foreground, a heavily cratered, airless moon hangs on the lower right, balancing a bright blue, cloud-covered Earth. The background is speckled with fine field stars, framing the two planetary bodies within the vast expanse of the galactic core region. ; acrylic on illustration board, Don Dixon 1976

079-view-from-the-periphery-dixon ; The lenticular shape of the Milky Way galaxy becomes apparent when viewed from outside. Acrylic and gouache on illustration board, 1976, Don Dixon

084-quasar-dixon – a massive black hole blazes in the core of a distant galaxy ; gouache on board, 1976

102-globular-cluster-dixon – Globular clusters may be the cores of galaxies that were disrupted by tidal interactions. Dozens of them swarm like bees about the core of the Milky Way ; This illustration captures a spectacular night sky dominated by a massive, densely packed globular cluster containing thousands of individual stars that concentrate into a brilliant white core. The periphery of the stellar cluster radiates outward with multi-colored stars, blending into the dark void of space. This cosmic view is framed from the low-angle perspective of a cold, textured planetary horizon, which shows rolling, icy terrain faintly illuminated by the collective starlight above. acrylic on board, 1977.

125-big-bang-1-dixon – the 4-dimensional universe squashed to 2 dimensions, creation is at the center, the present day at the edge ; This astronomical illustration visualizes the early primordial expansion of the universe, dominated by a blindingly white and yellow central singularity. Radiating outward from this concentrated energy source is a massive, circular shock front of deep red and orange cosmic fire. In the surrounding dark void, thousands of cool blue, embryonic protogalaxies or material fragments coalesce as they are propelled away from the primary explosion center. acrylic on board, 1980

132-galactic-core_2-dixon – globular clusters blaze in the sky of a planet near the center of our galaxy ; This astronomical illustration depicts a dynamic proto-galaxy characterized by a brilliant white central core that radiates intense light into an evolving spiral disk. The primary galactic structure is surrounded by countless spherical star clusters and smaller satellite systems condensing within vast, deep blue interstellar gas clouds. The entire cosmic panorama is framed from a low-angle perspective across the jagged, craggy mountain ridges of a cold, airless planetary surface in the foreground. acrylic and gouache, 1982

170-our-galaxy-dixon – Stylized view of the Milky Way as seen from 100,000 light years. This illustration presents an expansive overhead view of a grand design spiral galaxy rotating in deep space. A highly luminous, elongated central core composed of older yellow-orange stars transitions outward into tightly wound dust lanes and sweeping blue spiral arms populated by young stellar clusters. The vast galactic structure is set against a dark void speckled with distant background stars and foreground field stars. Acrylic on illustration board, 1988.

Galaxy Rising

263-galaxy-rising-dixon – a spiral galaxy rises gracefully in the sky of an alien world. cover of "Mountain Astrologer";acrylic and goauche and digital, 1983/2006; copyright Don Dixon / cosmographica.com

325-quasar-a-dixon – active galaxies collide, feeding matter to the central black holes that power quasars; This illustration depicts a violent gravitational interaction between two spiral galaxies in deep space. The larger galaxy on the right hosts an active quasar core, erupting with a brilliant, tightly focused particle jet of yellow-white light that shears through the surrounding space. Opaque dust lanes and tidal streams of stars tear away from the smaller companion galaxy on the left, funneling matter directly into the primary system's active accretion disk. acrylic and gouache painting by Don Dixon for "Scientific American"

Thorne-Zytkow Object

504-thorne-zytkow-object-tzo-dixon - TZO - a dead star inside a dying star. A neutron star stirs the chaotic heart of a companion red giant star. A cross-sectional artistic depiction of a Thorne-Żytkow Object (TZO), a theoretical hybrid star formed when a red supergiant swallows a dense neutron star at its core. The image shows a massive, glowing orange stellar envelope surrounding a highly energetic, turbulent central region where the degenerate neutron star resides. Bright, explosive convective patterns and high-energy white-pink radiation emanate from the deep core, illustrating the unusual nuclear processes driving the hybrid star's interior. digital, for Astronomy Magazine , copyright 2016 Don Dixon

Universe in Hand Inflation Graphic

503-universe-held-in-hand-inflation — The universe is shown when it was only 10 centimeters in diameter, 10^-32 seconds after the Big Bang during the inflation era. A conceptual, allegorical illustration depicting the early universe or cosmic inflation cradled within an open human hand against a stark black void. The universe is captured as a brilliant, fractured sphere of crystalline shards and intense explosive energy. Energetic rays of white, gold, and violet radiation burst outward from the central core, illuminating the fingers and palm from below to signify the immense scale and power of cosmic origins. Cover for Astronomy magazine, March 2016. Digital art by Don Dixon.

Solar System Stellar Neighborhood

497-solar-system-neighborhood-dixon – The Sun's Neighbors -geography of the Milky Way Galaxy. Our sun orbits about 30,000 light years from the center of the galaxy, which contains approximately 400 billion stars. Astronomers currently know of only about a dozen stars within 10 light years of the Sun (inset cube). The large rectangle encompasses a region of about 10,000 light years. Digital, for Scientific American, 2009. copyright Don Dixon

495-milky-way-rising-dixon – Milky Way Rising over an extragalactic planet; A dramatic fine art painting depicting a massive spiral galaxy, representing the Milky Way, dominating the night sky from a low-angle planetary perspective. The glowing core and sweeping, textured dust lanes of the galactic arms fill the upper atmosphere with brilliant white, gold, and deep blue starlight. Below, a serene, illuminated body of water reflects the celestial glow, bordered by a dark shoreline featuring the silhouettes of gnarled, moss-draped trees. Originally Spacescapes Number 60, this early gouache on illustration board painting shows our galaxy in the sky of an alien world high above the galactic pole; 1974 by Don Dixon.

Evolution of stars, planets, and brown dwarfs

494-stellar-evolution-disks-dixon –A detailed infographic chart illustrating the parallel evolutionary stages of stellar system formation from molecular clouds down to mature stellar objects. The diagram is split into two distinct vertical columns connected by gray downward arrows, contrasting a high-mass or solar-type star path on the left with a lower-mass or brown dwarf evolutionary path on the right. Each track progresses downwards from an initial collapse of a gas nebula into an accretion disk, followed by the clearing of the protoplanetary disk, and ending with fully formed substellar or planetary bodies at the bottom against a deep space background filled with cosmic dust. Artwork © 2007 Don Dixon / cosmographica.com

Galactic Star Streams

452-galaxy-star-streams-dixon – Streams of stars orbiting outside the plane of the Milky Way are thought to be the remains of small galaxies that were disrupted by tidal interactions and which are being assimilated into our own. An astrophysical illustration depicting a mature spiral galaxy enveloped by a complex network of stellar streams within its extended galactic halo. The primary disk of the galaxy glows with a bright yellowish-white nucleus and sprawling, dust-laden spiral arms rotating along an inclined plane. Looping around the main galactic structure are faint, filamentary arcs composed of thousands of stars, representing the tidal remnants of cannibalized dwarf galaxies torn apart by gravitational forces. Digital artwork for Scientific American © 2007 Don Dixon / cosmographica.com

Dusty halo around white dwarf star

491-white-dwarf-star-dust-disk-dixon – A dynamic astronomical illustration depicting a highly energetic debris field surrounding a dying white dwarf star. In the foreground, fragmented asteroids and rocky boulders undergo catastrophic tidal disruption, shedding fine gravel and dust into a vast, swirling circumstellar disk. In the upper right background, the brilliant violet-white stellar remnant unleashes powerful radiation rays that blast outward through the inner gaps of the dust rings, illuminating incoming cometary bodies vaporizing as they plunge toward the star. digital, for Astronomy Magazine

Supernova

486-supernova-melts-planet-dixon – Mountain ranges melt on the outer planet of a star that has gone supernova. Even before the wave of ejecta from the exploding star reaches the planet, the unimaginably intense radiation has turned the world's crust molten.

Sun and Ealy Star Compared

477-sun-early-star-compared-dixon – The first stars, formed perhaps only a few hundred million years after the Big Bang, were much more massive than our sun and much shorter lived, exploding as supernovae after shining for only a few million years. A comparative astronomical illustration contrasting two different classes of main-sequence stars against a deep black space background. On the left, a yellow G-type star, representing our Sun, glows with a distinct golden-yellow corona and subtle surface granulation patterns. On the right, a significantly larger, higher-mass hot blue star dominates the edge of the frame, emitting intense white-blue light and surrounded by a soft violet atmospheric fringe to show the variance in size, temperature, and luminosity between stellar classifications.

Lonely Galaxy

476-lonely-galaxy-dixon – Many billions of years in the future, the Milky Way will be alone in the observable universe, as all the local galaxies merge and the more distant ones recede beyond our ability to detect. A side-by-side comparative astronomical graphic demonstrating the formation or isolation of a "lonely galaxy" via cosmological void dynamics. The left panel shows a deep-field distribution of galaxies with overlay schematic arrows: light blue arrows point inward indicating that they are vistible to a central spiral cluster, while red arrows point outward toward galaxies that are too distant and receding too quickly to be observed from the central galazy. The right panel contrasts this complex environment with a single, highly isolated elliptical or diffuse galaxy glowing in absolute isolation against a pitch-black cosmic void. diagram for Scientific American

451-quasar-core-galaxy-dixon – The blinding radiance of a massive black hole shines at the heart of a young, distant galaxy. A spectacular astronomical painting depicting an active galactic nucleus, or quasar, dominating the center of a massive spiral galaxy. The core features an intensely brilliant, golden-orange accretion disk surrounding a supermassive black hole, emitting a piercing central starlight spike. Swirling outward from this energetic center are vast, sprawling spiral arms composed of dense blue star clusters, dark interstellar dust lanes, and countless individual stars rotating through deep space. acrylic on board, 1995

Milky Way Diagram

465-milky-way-bar-diagram-dixon – Infographic showing the barred structure of our galaxy. A face-on astronomical illustration mapping the structural architecture of a barred spiral galaxy, depicting the modern astrophysical consensus of the Milky Way's morphology. The core features a distinct, elongated central bar of older, yellowish stars surrounding a brilliant galactic nucleus. Tightly wound spiral arms branch outward from the ends of the bar, transitioning into expansive blue structures rich with young star clusters, nebulae, and dark, intricate interstellar dust lanes that fade into a black void. Artwork © 2007 Don Dixon / cosmographica.com

Formation of Brown Dwarf

463-brown-dwarf-forming-dixon – A brown dwarf star shines within its accretion disk. Streams of ionized dust and gas are drawn to the forming star by its magnetic field. A detailed astronomical illustration depicting a young protostar undergoing magnetospheric accretion within a dense stellar nursery. The central, turbulent orange protostar is surrounded by a massive, glowing circumstellar disk of dust and gas, with small planetesimal fragments orbiting in the dark foreground. Powerful magnetic field lines pull material out of the inner disk, funneling it onto the stellar surface in bright, energetic impact streams, while high-velocity blue gas jets erupt outward along the rotational poles into a backdrop of cosmic nebulae. Digital illustration for Scientific American © 2007 Don Dixon / cosmographica.com

Cepheid Variable Cycle

458-cepheid-variable-cycle-dixon – A Cepheid variable star pulses in a regular period that is directly related to its intrinsic brightness, allowing astronomers to use such stars as "standard candles" to measure distances to other galaxies. A three-panel sequential astronomical illustration demonstrating the dramatic pulsation cycle of a Cepheid variable star as observed from the surface of a barren, airless rocky planet or moon. The panels depict a time-lapse sequence tracking the simultaneous changes in the star's physical size, color temperature, and luminosity, along with the corresponding illumination cast onto the craggy landscape below.
Left Panel: The star is at its minimum size but highest temperature, appearing as a compact, intense white-blue sphere that casts sharp, cool, violet-tinted highlights onto the rocky ridges.
Middle Panel: The star expands into its largest and coolest state, swelling into a massive golden-yellow supergiant that floods the entire planetary landscape with a warm, amber-orange glow.
Right Panel: The star contracts back to its compressed, highly energetic white-blue state, returning the landscape to its initial coolly lit appearance and completing the periodic cycle.Artwork for cientific American, © 2007 Don Dixon / cosmographica.com

Type 1 Supernova Diagram

457-type-ia-supernova-mechanism-dixon – Diagram for Scientific American shows second type of supernova. A vertical, multi-stage astrophysical infographic illustrating the sequential mechanics of a Type Ia supernova explosion within a binary star system. The process flows downward against a black space background, detailing the progression from mass transfer to runaway thermonuclear detonation. Top Stage: A massive yellow donor star undergoes Roche lobe overflow, stripping its outer envelope into an accretion disk surrounding a compact, white dwarf companion star. Second Stage: A detailed callout focuses on the white dwarf, showing a cutaway of its internal shell structure as it approaches the Chandrasekhar limit (approximately 1.44 solar masses). A secondary callout zooms in further on the carbon-oxygen core where turbulent, runaway nuclear fusion is triggered.Third Stage: The white dwarf is shown in partial cross-section as a supersonic deflagration/detonation wave rips outward from the core, shattering the star's crystalline electron-degenerate structure amid brilliant rays of energy. Bottom Stage: The sequence culminates in a catastrophic thermonuclear explosion, showing a blinding white-hot central core surrounded by a rapidly expanding, turbulent orange shockwave shell that completely obliterates the white dwarf. Artwork © 2007 Don Dixon / cosmographica.com

Type 2 Supernova Diagram

454-type-2-supernova-diagram-dixon – Diagram for Scientific American shows steps in a celestial cataclysm. A vertical, multi-stage astrophysical infographic illustrating the sequential mechanics of a core-collapse (Type II) supernova event inside a massive star. The diagram details the transition from an onion-skin elemental shell structure down to gravitational collapse and the asymmetric explosion mechanisms against a deep black space background:
Top Stage: A massive evolved supergiant star is shown in a three-quarter cutaway, detailing its interior concentric shells of advanced nuclear burning (the "onion-skin" model). A callout lines up with the innermost zone, zooming in on the dense iron core where black vectors point inward to represent overwhelming gravitational pressures attempting to trigger core collapse.
Middle Stage: A secondary circular callout details the moment of core collapse. The central core has imploded into an ultradense stellar remnant (neutron star or black hole), while white arrows blast outward against the inward-rushing outer layers, showing the bounce shockwave mechanism.
Bottom Left Stage: The shockwave propagates unevenly through the star's remaining envelope, showing the early development of an asymmetric, butterfly-shaped stellar explosion with white outward-pointing expansion vectors.
Bottom Right Stage: The final phase details the violent, fully developed supernova remnant expanding rapidly into a non-spherical nebula of gas and dust. A prominent central arrow indicates the rapid space-velocity "kick" given to the central compact stellar remnant as it is ejected from the center of the asymmetric blast zone.Artwork © 2007 Don Dixon / cosmographica.com

Quasar Jet

326-quasar-b-dixon – This astronomical illustration depicts a powerful quasar operating at the core of a massive spiral galaxy that is undergoing a dynamic gravitational interaction or merger with a smaller companion galaxy. A brilliant, highly concentrated accretion disk surrounds the central supermassive black hole, fueling a pair of intense, bidirectional relativistic jets that blast perpendicularly out of the galactic plane. The tidal forces of the galactic collision pull streams of interstellar gas and stars between the two systems, feeding the active galactic nucleus (AGN) and triggering widespread star formation across the blue spiral arms. acrylic and gouache painting for the June, 1998 Scientific American cover by Don Dixon

Quantum Foam

329-quantum-foam-dixon – This theoretical illustration visualizes the concept of quantum foam, the substructure of spacetime at the incredibly minuscule Planck scale where gravitational and quantum mechanical fluctuations warp topology. Spherical and elongated bubble-like geometries represent localized universes, micro-wormholes, or nascent pocket dimensions budding from a highly energetic, turbulent background. The background features complex, self-similar fractal patterns of luminous blues, purples, and golds, illustrating the chaotic, non-smooth nature of spacetime where classical physics breaks down entirely. digital painting by Don Dixon

336-big-bang-2-dixon – This cosmological illustration visualizes the evolution of the early universe, transitioning from the primordial singularity toward large-scale cosmic structures. A brilliant, dense sphere of golden-white light signifies the initial, high-energy expansion of the Big Bang, surrounded by a chaotic, undulating field of matter and radiation soup. As the perspective shifts outward into the cooling dark voids of space, the primordial material condenses, revealing the formation of the first generation of distinct spiral and irregular galaxies emerging from the cosmic dark ages. digital painting by Don Dixon

Galaxy South Pole

342-galaxy-south-dixon – This wide-angle astronomical illustration showcases a dramatic edge-on perspective of a massive barred spiral galaxy, revealing the intricate, layered structure of its galactic disk. A luminous, elongated golden core dominates the lower-left center, populated by an aging population of yellow stars and surrounded by a dense concentration of young, pinkish star-forming H II regions. The sprawling spiral arms are heavily mottled with chaotic fields of multi-colored nebulosity—vibrant greens, blues, and deep oranges—interspersed with dense, dark lanes of interstellar dust that obscure the light from more distant stellar clusters. digital painting by Don Dixon

Milky Way Galaxy

343-galaxy-north-dixon – a view of the Milky Way galaxy from galactic north, showing the Dwingaloo Dwarf Galaxy in the distance - digital painting by Don Dixon

Dark Energy

348-quantum-cosmos-dixon– This cosmological illustration visualizes a theoretical timeline of the universe, depicting a cosmic "bounce" or transition through a narrow spacetime bottleneck. The left side represents a chaotic, high-energy primordial state characterized by a complex, interconnected web of fiery orange and magenta quantum fluctuations or a collapsing pre-Big Bang phase. As the timeline funnels through a highly compressed central singularity, it expands outward to the right into a structured, inflating modern universe populated by distinct spiral galaxies, stellar clusters, and planetary systems developing within the dark void of space. mysterious energy causes the expansion of the universe to accelerate, cover, January 1999, Scientific American - digital painting by Don Dixon

Cosmic Expansion Event Horizon

349-horizon-dixon– This theoretical cosmological illustration diagrams the concept of the particle horizon and the expanding boundaries of the observable universe over cosmic time. Arranged in a vertical, branching hierarchy against a black void that transitions to a fiery orange primordial baseline, the infographic uses spherical bubbles to represent growing cosmic horizons. As time progresses upward, isolated galaxies once trapped outside each other's causal boundaries expand their observational spheres, illustrating how regions of the cosmos gradually enter into causal contact as light has more time to travel across expanding space. digital painting by Don Dixon for Scientific American

Time vs. Temperature Diagram

350-time-temperature-dixon – This theoretical cosmological infographic contrasts two different geometric models of space and time expanding from a central singularity. Both diagrams present an inverted triangular light cone tracking cosmic evolution, where a pale blue border transitions into a fiery orange and dark purple interior, capped by a row of distinct spiral galaxies along the modern epoch at the top. The upper diagram overlays a grid of rigid, horizontal linear time slices, while the lower diagram maps cosmic expansion using curved, concentric coordinate lines intersected by branching yellow worldlines that trace galactic trajectories back to a unified origin point. digital illustration for Scientific American, 2002

Campanas Survey Diagray

358-campanas-survey-dixon – Volume of Universe Explored by Campanas Survey - This cosmological diagram illustrates the observational limits imposed by interstellar dust within our galaxy when mapping large-scale cosmic structures. A central, horizontal purple disk containing a beautifully rendered spiral galaxy represents the plane of the Milky Way, where dense gas and dust clouds obscure deep-space observations. Two transparent, cone-shaped wedges of light, colored in gradients of blue and magenta, project perpendicularly outward from the galactic core, mapping narrow "zones of avoidance" windows where telescopes can successfully survey distant fields of galaxies, galaxy clusters, and the deep cosmic web. digital painting for Scientific American, © Don Dixon

Evolution of Cosmic Structure

359-cosmic-structure-dixon Large Scale Structure of Universe - This theoretical cosmological diagram illustrates the structural hierarchy and scale of matter distribution in the universe, arranged in a counter-clockwise loop of spherical vignettes connected by expanding blue field cones. The sequence scales upward from an individual, finely detailed blue spiral galaxy at the top-left, moving through a localized group of galaxies, a massive galaxy cluster populated by hundreds of points of light, and a broader supercluster network. The culmination on the right shows the large-scale cosmic web structure of filaments and voids, which eventually smooths out at the maximum scale into a homogeneous, uniform lavender sphere, demonstrating the cosmological principle where the universe becomes uniform on its largest scales. digital painting by Don Dixon for Scientific American

Omega Galaxies

360-omega-galaxies-dixon –This deep-space astronomical illustration depicts a massive, dense concentration of galaxies clustering within the cosmic web, contrasted against a stark, empty void on the left. The right side of the composition is heavily populated by hundreds of distinct galaxies, ranging from well-defined spiral systems with glowing cores to faint, distant elliptical and irregular galactic structures scattered across the deep-space background. The distribution captures the non-uniform, clumpy nature of matter on intermediate cosmological scales, showcasing how gravitational attraction pulls galaxies together into large-scale sheets and filaments. digital painting by Don Dixon

Cosmic Locator Maps

371-locator-maps-dixon – Scale of the Universe in Four Stages - This four-panel astronomical infographic illustrates different perspective zooms of our cosmic address, utilizing nested spherical vignettes connected by transparent field cones. Each quadrant shifts focus to emphasize a distinct level of cosmic scale: the upper-left highlights our Local Group of galaxies dominated by a large spiral, the upper-right zooms into our solar system featuring Saturn and the inner planets, the lower-left centers on the dense stellar fields and nebulae of the Milky Way galaxy, and the lower-right expands out to a massive cluster field representing the large-scale distribution of galaxies. The repetitive, structural layout demonstrates how localized systems are embedded within progressively grander macrocosmic scales. digital painting by Don Dixon for the Smithsonian

Evolution of Stars Diagram

372-evolution-of-stars-dixon – This four-panel astronomical infographic charts stellar and cosmic evolution across distinct chronological scales. The top panel illustrates a macrocosmic scale from point-source stars to fully formed spiral galaxies and diffuse irregular clusters. The second panel details a star-formation timeline from a collapsing molecular cloud and accretion disk to a mature star flanked by a newly formed rocky planet. The third panel visualizes stellar lifecycles and deaths, contrasting low-mass planetary nebula ejection with high-mass supernova explosions. The bottom panel serves as a cosmological timeline, showing the expansion of space from the hyper-dense Big Bang cone out to the modern epoch populated by distributed galaxy structures. painting by Don Dixon for Smithsonian Institution, © Don Dixon

Ancient Globular Cluster and asteroid

435-ancient-cluster-dixon – Strange clusters that seem to be a cross between open and globular clusters harbor stars that may provide clues to the evolution of the early universe. Cover for Astronomy, May 2005.

Lonely Universe Diagram

434-lonely-universe-dixon – The universe becomes very lonely as dark energy pushes most of it beyond our horizon. Diagram for Scientific American, 2004. © Don Dixon

Hypernova

433-hypernova-dixon – Gamma rays burst from either pole of a shattered star undergoing a hypernova explosion. A cataclysmic hypernova explosion erupts from the core of a collapsing, ultra-massive star, signaling the birth of a central black hole. An expanding, multi-colored torus of stellar debris and high-temperature plasma shears outward in shades of gold, turquoise, and magenta. Twin relativistic jets blast violently along the rotational axis, channeling intense radiation and particles into deep space across a dense background of stars. © Don Dixon, 2005.

The Cosmic Dark Ages

432-cosmic-dark-age-dixon –Although the early universe was immensely hot, it was dark, because photons were not able to travel through the highly-ionized gas. In this diagram of cosmic evolution, the upper left represents the cosmic dark age. Proceeding toward the lower right, the universe cools, atoms form, and filamentary structures condense to form galaxy clusters. © Don Dixon 2005.

Hubble Ultra Deep Field Diagram

431-hst-ultra-deep-field-dixon –Diagram showing the very small part of the sky that was surveyed in the Hubble Space Telescope's Ultra Deep Field project. Digital diagram, Popular Mechanics, 2004.

Cat Eye Nebula

417-cat-eye-nebula-evolution-dixon –The strange and beautiful shapes of planetary nebulae, like the Cat's Eye, form through complex interactions between stellar winds and magnetic fields. A step-by-step schematic diagram illustrates the complex structural evolution of a bipolar planetary nebula, akin to the Cat's Eye Nebula. Arranged across a black void, five evolutionary stages demonstrate a central aging star shedding its outer layers into expanding rings, tori, and polar jets regulated by magnetic fields or a binary companion. The sequence culminates at the bottom with a highly detailed, nested bubble structure showing concentric orange, red, and turquoise ionization shells. Digital, 2004, for Scientific American. © 2005 by Don Dixon.

Cosmic Brane

414-cosmic-brane-dixon – Some scientists speculate that, if microscopic black holes can be formed by the Large Hadron Collider, they may bridge the hyperdimensional gap between "branes" , demonstrating the existence of other universes. An abstract, geometric visualization depicting theoretical concepts of string cosmology and brane multidimensional space. A warped, translucent orange surface representing a dynamic cosmic membrane or "brane" curves down over three metallic spheres of increasing size resting on a flat, light blue plane. The minimalist 3D rendering uses clean lighting and shadows to represent complex mathematical ideas like higher dimensions, bulk space, or parallel universes interacting within a multiverse framework. Digital, 2005, for Scientific American. © Don Dixon

The Most Ancient Stars

The most ancient stars in the universe may provide clues to its evolution. This montage, suggesting the formation of stars and galaxies out of the Big Bang, was the June, 2005 cover for "Astronomy" magazine.

Cosmic Inflation

411-cosmicinflation-dixon –In the theory of cosmic inflation, the universe expands from the size of an atomic nucleus to a baseball in a tiny fraction of a second. A progressive, conceptual infographic models the exponential expansion of space during cosmic inflation. Beginning as a small, sequence of solid white, yellow, and orange spheres, the nascent universe balloons rapidly into massive, nested bubbles filled with complex filamentary webs. The largest foreground structures transition from translucent pink networks to a massive, curved blue expanse showing the large-scale distribution of matter in the modern cosmos against a black void. Digital, 2005 © by Don Dixon.

Constellation Orion in 3D

409-orion-constellation-3d-dixon – The stars delineating the constellation Orion are dispersed across nearly 2,000 light years in this 3D representation. A technical infographic visualizes the true three-dimensional spatial distribution of stars within the Orion constellation relative to Earth. White sightlines project from a realistic Earth globe on the left, passing through a translucent blue vertical pane that displays the familiar, flat constellation pattern. Beyond this 2D projection screen, the individual stars are extended into true deep space at varying physical distances, suspended above a blue horizontal scale plane by vertical guide lines. Digital, 2003. © by Don Dixon.

Dark Matter Halo

401-dark-matter-halo-dixon –This diagram created for the March, 2003 issue of Scientific American suggests the immense halo of mysterious dark matter that many astrophysicists believe surrounds our galaxy. The visible stars and gases of the Milky Way contribute less than ten percent of its total mass. A conceptual wedge cutaway from the massive, glowing blue and translucent white spherical structure exposes the interior layout, showing how the invisible mass distribution extends far beyond the visible galactic disk. The diffuse halo reaches into the surrounding deep space void, providing the gravitational scaffolding necessary to hold the spinning galactic structure together.

Universe Time Line

389-universe-time-line-dixon –History of the universe in four stages: the Big Bang is marked by the left vertex, followed by a million-year dark age until the first stars form at the intersection of huge filaments of primordial hydrogen. A period of intense star formation and violent explosions lays the foundation for the universe we see today. - painting by Don Dixon for Scientific American

Proto Galaxies Form

387-proto-galaxies-dixon –An astronomical visualization models the early universe, highlighting a dense web of interconnected purple dark matter filaments and gas networks. A localized white bounding square targets a high-density intersection where the first structures form. This targeted region projects forward into a large, three-dimensional callout cube, revealing emerging proto-galaxies igniting as bright white points of light within the primordial fog. Digital painting for Scientific American

Starbirth and Death diagram

386-cosmic-cycle-dixon –Created in collaboration with Bryan Christie, this diagram illustrates a kind of cosmic ecology. Radiation from bright stars and violently ejected gases from supernovae replenish and compress interstellar clouds of gas and dust, leading to the formation of new stars - painting by Don Dixon for Scientific American, © Don Dixon

The Galactic Atmosphere

385-galactic-atmosphere-dixon – Even the galaxy has a kind of weather, in which fountains of tenuous gas arch high above the galactic plain through vents blasted by supernova explosions. A scientific visualization depicts the high-energy, turbulent gas dynamics within a galactic atmosphere or circumgalactic medium. An intense, linear orange-red horizon of hot plasma bisects the composition, venting loops and tendrils of cool purple and magenta gas into the surrounding void. On the right, a brilliant white energetic flare ionizes a broad swath of the interstellar medium, creating a dense, glowing purple cloud structure. digital painting for Scientific American, © Don Dixon

Quintessence

382-quintessence-dixon – Quintessence, an energy that pervades space-time, may regulate the expansion of the universe. A deep-space visualization depicts a dynamic cosmological model where a vast, textured field of dark energy or quintessence permeates the universe. Swirling, cellular clusters of dense crimson and scarlet matter form a vast structural web across a deep red cosmic backdrop. Thousands of detailed, tiny spiral and elliptical galaxies drift through the crimson medium, aggregating along the high-density energetic nodes of the cosmic framework. digital painting by Don Dixon for Scientific American

Milky Way

377-seti-galaxy-dixon –The Milky Way Galaxy - A grand, sweeping spiral galaxy tilts dynamically across a black cosmic void, its brilliant yellow-white core surrounded by tightly wound spiral arms. The structure is heavily detailed with mottled blue star-forming regions, pink emission nebulae, and complex lanes of dark interstellar dust cutting through the galactic plane. In the deep background to the upper left, the Andromeda galaxy accompanied by a tiny satellite galaxy drifts in isolation. digital painting by Don Dixon for Scientific American

Microwave Anisotropy Probe Diagram

orbital diagram; Microwave Anisotropy Probe (MAP) - painting by Don Dixon for Scientific American

375-microwave-probe-dixon – The Microwave Anisotropy Probe (MAP) spacecraft floats in deep space, deploying its back-to-back primary reflectors to measure temperature fluctuations in the cosmic microwave background. A large, circular golden thermal shield protects the sensitive instruments from solar radiation, keeping them oriented away from the distant, eclipsed Sun and Earth visible on the left. Dual translucent pink scan paths extend from the telescope's optics into the background starfield, slicing across a diffuse band of zodiacal light. digital painting by Don Dixon for Scientific American

Solar System

Landscapes