A is a small bit of asteroid, comet, or planet out and about in the solar system. When one of these pieces enters the Earth’s atmosphere, we see a flash of light and call it a . If these bits make it to the surface of the Earth, we call them .

What is the minimum mass requires for a star?

Which point on the Hertzprung-Russell diagram represents the main sequence star with the longest lifetime?

The asteroid belt exists between the following planets

The most abundant element in the sun is

What is the likely final fate of a star whose mass is 25 solar masses after it has finished its nuclear burning phases?

Match the number with the correct name for that part of the galaxy.

Stars spend 90% of their lifetime

Which of the following types of galaxies are reddest in color?

Regions of high gravity do not expand with the expansion of space-time. Are galaxies considered regions of high gravity?