Gravity and Space
Explore gravity and space with interactive experiments. Find your weight on other planets, drop a feather and a hammer on the Moon, swing pendulums and launch satellites into orbit to learn how gravity shapes the universe.
Gravity and Space experiments
Feather and Hammer
Drop objects with and without air, just like on the Moon.
Try it nowWeigh Me on Mars
Stand on the scales on every planet in the solar system.
Try it nowOrbit Builder
Launch a satellite: too slow it crashes, too fast it escapes.
Try it nowPendulum Clock
Change the length and planet, then time the swing.
Try it nowMoon Phases and Tides
Move the Moon round the Earth to see its phases and spring and neap tides.
Try it now
Key equations
W = m × gF = G·m₁·m₂ ÷ r²T = 2π√(L ÷ g)