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| a group of objects in space that move around a central star |
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| a burning sphere of gases, like our sun |
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| a large object that moves around a star |
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| the imaginary line that run through both poles of a planet that it rotates around |
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| the planets that are closest to the sun |
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| planets further away from the sun like Jupiter & Saturn |
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| third planet from the sun |
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| the changes in the apparent shape of the moon |
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| four of the outer planets (Jupiter, Saturn, Uranus & Neptune) that are mostly made of gases |
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| tiny bits of dust, ice crystals and small pieces of rock |
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| the movement of a planet in orbit aroudn the sun |
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| How long does it take the Earth to complete a revolution? |
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| How long does it take the Earth to rotate once on its axis? |
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| the path an object takes when revolving around another object |
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| small & rocky objects that move around the sun |
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| small mass of dust and ice that orbits the sun |
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| a tool people use to observe distant objects |
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| collects and focuses light, magnifies an object |
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| collects and focuses invisible radio waves |
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| vehicles sent to explore space |
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