Multiple Choice
What is a spectroscopic binary?
A) an instrument for taking spectra of two sources simultaneously
B) a binary system detected through the shifting spectral lines of its stars
C) a binary system in which one star moves directly in front of the other
D) a pair of stars that are very close to each other on the sky but are not physically related
Correct Answer:
Verified
Correct Answer:
Verified
Q16: The motion that is used to change
Q17: The star Arietis has an apparent magnitude
Q18: Two of the brightest stars in Orion
Q19: How bright (in absolute magnitude) are the
Q20: Which of these observations would NOT be
Q22: Light leaving a point source spreads
Q23: For Balmer series lines to show up
Q24: Very hot stars have weak hydrogen spectral
Q25: Which of these spectral luminosity classes corresponds
Q26: Aristotle (fourth century B.C.) rejected the idea