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| interplanetary depris with a diameter greater than 100m orbiting sun |
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| interplanetary debris composed mainly of ice/dust in elliptical orbit about sun |
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| interplanetary debris with diameter of less than 100m outside Earth's atmosphere |
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| galaxy that is flat disk rotating around a center with spiral arms |
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| galaxy with a round or oval shape |
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| galaxy without a distinctive shape |
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| swirling cloud of gas that surrounds the region where a star is forming |
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| remant of cluoud of gas that did not become hot enough to initiate nuclear fusion |
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| carbon core of a dying star that shines only on stored heat |
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| when a star swells because all the hydrogen is gone from its core |
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| explosion resulting when the core of a very massive star implodes and rebounds |
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| region of space wher ethe pull of gravity is so great that nothing can escape |
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| cosmic microwave background |
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| radiation created during the early moments of the universe |
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| name the terrestrial planets |
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| how do the densities of the terrestrial and jovian planets compare? |
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| largest and most massive planet in our solar system? |
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| how do the planets' orbits around the sun compare |
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| do terestrial planets have many moons? |
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| do jovian planets have many moons? |
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| where does the asteroid belt lie? |
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| what is the m ost abundant element in the universe? |
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