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doit_the_clown doit_the_clown
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A distant star of spectral type M is found to be very bright, easily visible from Earth. How would you describe it and what would be its place in the Hertzsprung-Russell diagram?

(a)   Red supergiant. Upper right-hand corner of the H-R diagram.
(b)   Red dwarf on the main sequence. Lower right-hand corner of the H-R diagram.
(c)   Blue supergiant on the main sequence. Upper left-hand corner of the H-R diagram.
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Discovering the Universe

Discovering the Universe


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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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