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doit_the_clown doit_the_clown
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7 years ago
Which of the following is NOT a characteristic of T Tauri stars?
A)   Variations in brightness   C)   Nuclear reactions in the core
B)   Ejection of mass into space   D)   Emission lines in the spectrum
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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discovererdiscoverer
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7 years ago
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