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Scientists Prove Gravity In Planetary Orbits
An eighth grade science Q and A explains gravity proofs from Earth to planets. It notes Earth’s gravity keeps the Moon in orbit, Mars’ moons remain in place, Jupiter and Saturn’s many moons stay on tracks, and Venus Mercury and Pluto lack moons yet follow orbits due to solar gravity. Gravity also pervades the Sun and Earth’s interior, with the Sun’s gases held together by gravity and the Earth’s core dominated by heavy metals. The piece mentions a free illustrated leaflet The Alphabet offered by Uncle Ray via The Journal.
MENTIONED IN THIS ARTICLE
Earth
Moon
Mars
Jupiter
Saturn
Venus
Mercury
Pluto
Uncle Ray