Stargazing For Everyone

Stars and Constellations - Start with a Book

1 Introduction This day focuses on one of the most awesome things we can see in the night sky: stars and star patterns that we call constellations.Stars are big exploding balls of gas — mostly hydrogen and helium — held together by their own gravity.Astronomers think that there are 200 billion stars in the Milky Way , the galaxy where our own solar system lives.