A giant elliptical galaxy swallows up a young spiral galaxy. Commissioned by All About Space magazine. 

A view of a planetary disc (early solar system) from inside. Planets are just forming from the swirly dust clouds and asteroids held tightly around the star. 

Dark matter holds clusters of galaxies together. Dark matter accounts for nearly one-quarter of the universe, but scientists do not yet know what it is. Dark matter is virtually invisible to current scientific tools, and it's existence is surmised by looking at the way gravity is warped far beyond what can be attributed to visible matter. Artwork digitally painted for ScienceNews, © Nicolle Rager Fuller 2011.

A planetary disc, or early solar system, when planets are just forming from the swirly dust clouds and asteroids held tightly around the star. 

Space satellite voyager has just left our solar system, or has it? The edge of our solar system is a fuzzier line than one might know. Voyager has left the edge of what's called the heliopause, where the solar winds end and the interstellar winds dominate, but it is still within the larger Oort cloud. Created for Science News magazine.