Physical limits that make star formation very difficult
How many stars can be seen with an unaided eye?
A discussion on the speed of light, travel of light, and distances to stars in the universe
What is the purpose of the Sun? How vital is it for life on our planet?
What is the closest star to us, how far is it, and what do we know about it?
Mechanisms at work on the Earth that protect us from our Sun
Definition and brief explanation of what a globular cluster is.
What is a pulsar
What are quasars and what makes them different