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The Universe
Term | Definition |
---|---|
astronomers | experts in the science that deals with the Sun, Moon, planets, stars, and galaxies |
collapse | to cave in |
collide | to strike violently together |
compact | firmly packed together |
galaxy | a group of billions of stars forming one system |
particles | extremely small units of matter |
cosmic | having to do with the whole universe |
optimistic | hoping for the best |
outbursts | acts of bursting forth |