Milky+Way

=**What is the Milky Way**= Milk Way is one of the billions of galaxies that can been seen in the universe, formed manily by large cloud of gas and dust. The name of the "Milky Way" came from the band of light that can be seen across the visible celestial sphere. It is estimated to 13 billion years old based on the fact that one of the oldest stars in the system is roughly 12 billion years old.

It is the home galaxy to earth, as well as others solar systems that we are well aware of, including planets such as saturn , mars and such. The Milky Way is 100,000 light years in diameter. It is 12,000 light years(gas) or 1,000 light years(stars) thick. It has a mass of 5.8×10 solar mass to the power of 11 and contains anywhere from 200 to 400 billion stars. Many astronomers also believed that the milky way is moving at a speed of roughly 600 km per second, but it is estimated that it can vary from 130km/s to 1000km/s according to conflicting calculations.

Structures of the Milk Way
The Milky Way is divided into three main parts:


 * The halo - an area containing some of the oldest star in the galaxy, it is composed of an incredible amount of dark matter.
 * The galactic center - contains a super-sized black hole (relatively in our galaxy), it has roughly the same mass of 2 million suns ,
 * The spiral disk - contains most of the stars in the galaxy, it is covered in gas and dust.

The Future for this galaxy
Scientist now estimate that in 3 billion years, the Milky Way galaxy will collide with the neighbouring Andromeda galaxy, which is slowly working its way toward us in a speed of 1800 km per minute.

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