________ binary star systems are important because they allow astronomers to determine the mass and the ________ of the stars in the system.
A. Spectroscopic; temperature
B. Eclipsing; temperature
C. Visual; temperature
D. Eclipsing; diameter
E. Spectroscopic; diameter
Answer: D
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a. 70 J c. zero b. -20 J d. 20 J
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a. True b. False Indicate whether the statement is true or false
The objective of most radio telescopes is similar to the objective of a reflecting optical telescope in that
a. they are both concave in shape b. they are both convex in shape c. they are typically the same size d. they are both made of metal. e. they have nothing in common.
Which is not a type of gravitationally bound stellar binary?
A: visual binary B: eclipsing binary C: spectroscopic binary D: apparent binary E: astrometric binary