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doit_the_clown doit_the_clown
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7 years ago
A pulsar is
A)   a rapidly rotating neutron star, emitting beams of radio, and sometimes X-ray and visible, energy.
B)   a binary star in which matter from one star is falling onto the second star.
C)   an object at the center of each galaxy, supplying energy from its rapid rotation.
D)   a pulsating star, in which size, temperature, and light intensity vary regularly.
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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