A graphical diagram of the universe with a descriptionA graphical diagram of the universe with a description
A researcher of the universe at work in a spaceshipA researcher of the universe at work in a spaceship
The rays of the sun through the branches and foliage of the treeThe rays of the sun through the branches and foliage of the tree
Planets on the background of mountains and water in blue tonesPlanets on the background of mountains and water in blue tones
The scale of one planet and the observable universeThe scale of one planet and the observable universe