galaxy - a huge system of gas, dust, and stars held together by gravity, solar system - the Sun and the eight planets, their moons, and all other objects that travel around it , planet - a large round object in space that orbits a star, comet - a mixture of frozen gases, ice, dust, and rock that moves in an elliptical orbit around the Sun, asteroid - a rock that revolves around the Sun, moon - a natural satellite that travels around a planet , Earth - the only known planet in the solar system to have oxygen and liquid water, correct order of the Inner Planets  - Mercury, Venus, Earth, Mars (MVEM), correct order of the Outer Planets - Jupiter, Saturn, Uranus, Neptune (JSUN), types of galaxies - spiral, elliptical, irregular,

Grade 5 Science - Space

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