The Museum will be open on Wednesday, January 28, during regular hours, from 10 am to 5:45 pm. Due to the weather, some programs have been cancelled. Please check here for a full list, and check back for regular updates.
Regular updates will also be posted to our Facebook page and Twitter account (@AMNH).
The Moon orbits Earth. Earth orbits the Sun. The Sun orbits the center of the Milky Way Galaxy. Gravity governs all of these motions, holding moons, planets, and stars in their orbits. If gravity ceased, the solar system and our galaxy would fly apart.
Keywords: Astrophysics, Gravity, Orbits
Ice-skaters spin faster when they pull their limbs in tight. The same principle applies to the collapsing cloud that formed the solar system.