Asteroids have been detected around nearby stars through
A) ripples observed in the protoplanetary disks around these stars.
B) hot dust generated by collisions amongst the asteroids.
C) reflected light from the star.
D) spectral lines from gas evaporated from the asteroids.

Question

Quizplus · Accepted Answer

Asteroids around nearby stars are often detected by observing the infrared emission from hot dust, which is generated by collisions among the asteroids. This dust emits heat that can be detected as excess infrared radiation.

Asteroids Have Been Detected Around Nearby Stars Through