Quasars+and+Supermassive+Black+Holes+=P+-+By+Nathan

By Nathan __**
 * __ Quasars and Supermassive Black Holes

**Quasars lie at the centre of galaxies, devouring entire stars, which is why they produce so much light. They consume about the material equivilent to 600 Earths per hour. Since Quasar's can't feed at such a high rate and mantain it for 10 billion years, once it has consumed all the gas and dust around it, it eventually dies.
 * What are Quasars you might ask? Quasars are super massive black holes at the very edge of the universe. They are about the size of our Solar System and are as bright as 1000 galaxies! Luckily, there are no Quasars near Earth. This is because the Quasars that we see are billions of years old, and because it takes 10-15 billion years for light from the Quasar to reach Earth, we see the Quasar as it was 10-15 billion years ago. By this time, the Quasar would probably be dead. **



After this period, the Quasar then turns into a normal galaxy. We live in a galaxy known as "The Milky Way Galaxy".



Astronomers are quite confident that there is a Supermassive black hole in the centre of our Milky Way Galaxy, due to a number of observations. This black hole is around a section of the Milky Way Glaxy called Sagittarius A. Our galaxy isn't the only one with a Supermassive Black Hole at the centre of the galaxy. Astronomers are almost certain that nearly all galaxies have a Supermassive Black Hole.**