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