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Physics 18 Online
OpenStudy (anonymous):

Star C has approximately the same blackbody spectrum which peaks at the same wavelength as Star A.

OpenStudy (anonymous):

What is the radius of star C? Star A has parallax of 10^-3" and radius of 10^8m. Apparent magnitude of 17.4 absolute magnitude of 7.4 Star C has a parallax angle of 10^-2" and appears to be 10^4 times brighter than star A

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