Question 1
Radio telescopes are generally ________ than are optical telescopes.
◦ smoother in surface
◦ much simpler
◦ much larger in size
◦ more precise (higher resolution)
Question 2
Sunspots appear dark because they are ________ than the surrounding solar surface.
◦ much closer to the Sun's core
◦ cooler
◦ less ionized
◦ more energized