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Question
The mass of a star can be directly determined by knowing its _________?

Binary star systems orbit around:

the center of the larger of the stars.
the center of mass of the two stars.
the center of the smaller of the stars.
a point exactly halfway between the two stars.

Comparing the size of Doppler shift of the two objects in a binary system allows us to determine their relative:

masses.
luminosities.
temperatures.
size.

Answer
The mass of a star can be directly determined by knowing its _________? SPECTRAL CLASS

Binary star systems orbit around:
the center of mass of the two stars.

Comparing the size of Doppler shift of the two objects in a binary system allows us to determine their relative:
masses.

Astronomy

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Volunteer


Patrick Weiler

Expertise

I`d be pleased to answer questions about any aspect of astronomy, particularly those related to cosmology, astrophysics, and planetary sciences. I can also provide reliable information on unique topics like dark energy, dark matter, black holes, etc.,.

Experience

Teacher, adult after-hours education at local community college, including frequent "star parties." I have my own telescope system, and continue to stay apace of recent developments and emerging theories in the field.

Education/Credentials
BA, liberal arts with emphasis on sciences. BS, computer technology.

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