Interstellar extinction is the
A) assimilation of interstellar matter by stars after gravitational attraction and capture.
B) reduction of the apparent brightness of stars by scattering and absorption of their light by intervening interstellar clouds.
C) wipeout of species on Earth by intense radiation from a nearby supernova.
D) deaths of high-mass stars in the space between other long-lived stars.
Correct Answer:
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Q15: What do a reflection nebula surrounding a
Q16: Which of these common molecules found in
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Q18: A star cluster at a great distance
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Q21: How is gas distributed in interstellar space?
A)
Q22: What is the typical mass of a
Q23: What fraction of the mass of a
Q24: In which part of the electromagnetic spectrum
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