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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
Authors:
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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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7 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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Yesterday
Brilliant
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2 hours ago
Good timing, thanks!
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