Multiple Choice
An asteroid belt has been discovered around the star Zeta Leporis.How were these comets discovered?
A) The asteroids were imaged directly by the Hubble Space Telescope.
B) A ring of hot dust was discovered around the star by spectroscopy, and collisions among asteroids were inferred as the cause.
C) The gravitational effects of the asteroids have created an off-center disk of dust and gas around the star.
D) The gravitational effects of the asteroids cause the star to wobble slightly in its proper motion.
Correct Answer:

Verified
Correct Answer:
Verified
Q1: Extrasolar planets have NOT been found:<br>A) around
Q3: Which characteristic in extrasolar planets is one
Q4: Calculations suggest that the number of free-floating
Q5: Observers in a distant solar system are
Q6: In searches for planets orbiting stars other
Q7: A particular star shows spectral lines of
Q8: Of the perhaps 200 billion stars estimated
Q9: Comets been discovered around the star Beta
Q10: What was the FIRST direct evidence that
Q11: The atmosphere of the gas-giant planet HD