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
Click to open this image within the album!
