MILKY WAY GALAXY
The Milky way galaxy is the galaxy that contains our solar system , with the name describing galaxy's appearance from earth.It is spiral shaped galaxy that consists of several hundred billions stars.
Radius : 52,850 light years
Age: 13.51 billion years
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| Source : John fowler |
HOW BIG IS THE MILKY WAY ?
The Milky Way is Earth’s home galaxy, the stellar city in which we reside. It’s hefty, containing a few hundred billion stars. And it’s so spacious that, even traveling at the speed of light, it would take more than 100,000 years to get from one side to the other. It’s Frisbee shaped, though; so, from top to bottom, you could drive on a shorter, thousand-light-year jaunt.The center of Milky way is a supermassive black hole of around 4.100 + 0.034 million solar masses called Saggittarius A.
MILKY WAY GALAXY FROM EARTH
All the stars we see in the night sky are in our milky way. Just as the earth goes around the Sun , the Sun goes around the center of Milky way. The time taken by our sun to revolve around the center of milky way once is called cosmic year and it is equal to 230 to 250 million terrestrial years.
WHAT IS THE MILKY WAY MADE OF ?
Milky way primarily consists of stars, gas, dust and dark matter. Among those four components it is believed that 90% is dark matter and only 10% is visible.
WHAT IS DARK MATTER IN THE MILKY WAY?
Dark matter is a form of matter which is said to account approximately 85% of the matter in the universe. It is composed of such type of particles that don't absorb, reflect, or emit light so they can't be detected by observing the electromagnetic radiation.It's existence can be proved by observing the effect it cause on the object that we can observe directly.They interact predominantly via gravity with visible matter that's why it was accounted to be a part of universe to explain the mysterious effect it causes to the rotation of galaxies, motion of clusters.
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