Be a photon, escape the sun.
Build a solar system (original 2D version).
Resize objects until they're the correct relative size.
Save the Earth from asteroids.
Film yourself on the Moon, Mars, and more!
Look at the Sun in different ways.
Is it a solid, liquid, gas, or plasma?
Planet Families 2
Build a solar system in 3d.
Drive a Mars rover.
Fly to Mars
Launch a spacecraft from Earth to Mars and back again.