Electromagnetic radiation cannot travel through empty space, but propogates through an invisible medium known as the “luminerous aether.”

Red dwarfs, the smallest, coolest stars, appear in the upper left of the HR diagram.

Virtually all modern optical telescopes use a _____ design.

Compared to the population of stars in the galaxy, the Sun’s mass is

The hottest, brightest main sequence stars are spectral class

The equator of the Sun rotates faster than the poles. Because of this

A parsec is the distance at which the change in the star’s apparent position with a baseline of 1AU is one arc-second.

Bands of clouds on Saturn are muted and blurred because Saturn has less mass than Jupiter.

To which of the following e-m radiation bands is the atmosphere transparent?

Titan has… (check all that apply)