Interesting facts about Milky Way Galaxy

Do you know that our solar system is inside the Milky Way Galaxy?  Yes, Milky Way Galaxy is the Galaxy in which our solar system is located.  Milky Way is one of the billions of other galaxies in this universe.  Here are some of the most amazing facts about Milky Way Galaxy.

• There are more than 200 billion stars in Milky Way Galaxy
• The largest neighboring galaxy to Milky Way galaxy is the Andromeda Galaxy
• The oldest star in Milky Way Galaxy is 13.2 billion years old which is almost same as old as the universe
• The diameter of Milky Way Galaxy is 100,000 light years
• The galactic year is the time needed for solar system to complete one orbit around the galaxy.  In the case of Milky Way galaxy, it is abut 225 to 250 million years
• The Andromeda Galaxy is approaching our galaxy at a speed of 140 kilometers per second which means Milky Way galaxy may collide with Andromeda in 3 to 4 billion years
• There are black holes in Milky Way Galaxy
• The milky way galaxy rotates clockwise