Gravity - Fundamental force of the universe, one that causes every object in the universe to attract every other object., Mass - how much matter an object contains, Weight - the force exerted on a mass by gravity, Terrestrial Planets - Mercury, Venus, Earth, Mars, Jovian Planets - Jupiter, Saturn, Uranus, Neptune, Gas Giant - Jupiter and Saturn, made mostly of hydrogen and helium., Ice Giant - Uranus and Neptune, made of heavier materials., Solar Eclipse - When the moon passes between the Sun and Earth and perfectly lines up to partially or totally cover the Sun., Lunar Eclipse - When the moon passes through Earth's shadow., Orbit - a regular, repeating path that one object in space takes around another one., Asteroid Belt - In between Mars and Jupiter. , A Moon - a celestial object that is a natural satellite to a planet. Moons orbit planets. , Partial Solar Eclipse - Moon partially covers the Sun, Total Solar Eclipse - the Sun is 100% blocked by the moon, perfect alignment, Earth's Tilt - 23.5 degrees,

Astronomy Vocabulary

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