It is humbling to discover that our incredibly large galaxy, The Milky Way, is only a small insignificant dot in a gigantic universe. We usually think of the stars in our galaxy as being loosely scattered throughout the vast expanse of outer space. These stars are not "spread out," but are "lumped" together in confined groups called galaxies. These confined groups, however, are still enormous in size. Our galaxy (the Milky Way), for example, is over 90,000 light years wide. This means if you were traveling at the speed of light (186,282 miles per second) it would take you 90,000 years to get from side to side. That’s a distance of over 500 million billion miles. Although our galaxy is incredibly huge, it is only a small spec in comparison to the rest of the universe. There are at least a 100 billion galaxies in the universe. Most galaxies consist of 10 to 100 billion suns (stars). Our Milky Way, however, has over 200 billion stars and there are some galaxies that have over 50 trillion stars. When we look up at night and see the stars scattered throughout the sky, we usually think we are seeing the various stars scattered throughout the whole universe. In reality, though, we are only seeing the stars in our own galaxy; and even then it is only a small portion of them (about 3,000 stars).
Title Image courtesy of Windows to the Universe