In recent decades, astronomers discovered stars even cooler than the traditional spectral type M stars recently. Astronomers gave these cool stars a new spectral type, L. If you wanted to go out and find more such type L stars, what kind of instrument would it be smart to use?
A) an x-ray telescope, in orbit above the Earth's atmosphere
B) a sensitive infra-red telescope
C) a small visible-light telescope (something even an amateur astronomer or small college might have)
D) a CCD attached to an ultra-violet telescope
E) a swimming-pool size vat of commercial cleaning fluid, deep in an abandoned mine

Question

Quizplus · Accepted Answer

Cool stars emit mostly in the infrared part of the spectrum, so a sensitive infrared telescope would be the best choice to find more type L stars.

In Recent Decades, Astronomers Discovered Stars Even Cooler Than the Traditional