When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in ...
The diagram shows the life cycles of stars that are: about the same size as the Sun; far greater than the ... falls together it gets hot. A star is formed when it is hot enough for the hydrogen ...
The diagram shows the life cycles of stars that are: about the same size as the Sun; far greater than the ... falls together it gets hot. A star is formed when it is hot enough for the hydrogen ...
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