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Home Q & A Board Science-Related Homework Help Physics
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doit_the_clown doit_the_clown
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7 years ago
To an astronomer, what is a “standard candle”?
A)   A standard light source that is placed in a telescope, to which the brightness of stars and other objects can be compared
B)   Any galaxy whose redshift has been measured accurately
C)   Any type of object whose absolute magnitude or intrinsic brightness is known
D)   An accurately defined brightness scale for stars and galaxies, such as the magnitude scale
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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papachulopapachulo
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7 years ago
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doit_the_clown Author
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7 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
TheMoffattMan
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Yesterday
Good timing, thanks!
MAry1395
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2 hours ago
This helped my grade so much Perfect
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