Cool Facts about our Galaxy and Important facts about our Galaxy 2018 - Facts Did You Know?

Cool Facts about our Galaxy 2018:-

Did you know that there are around one hundred billion galaxies in our universe so here are some Cool Facts about our Galaxy and Important facts also so here we go:-

What is a Galaxy?

galaxy is a large cluster of stars, planets, star clusters, gas and dust all gathered and held together by gravity. Amazingly, scientists estimate that there could be over 100 billion galaxies in the observable universe.

1.Visible light, the light we can see, is only one form of energy given off by stars and other objects in the Milky Way. Our galaxy also consists of other types of energy, such as infrared light, radio waves, gamma rays, dark matter, and X-rays.

2.The very center of the Milky Way contains a powerful gravitational force that scientists believe is a black hole, which they have named Sagittarius A*. Astronomers believe this black hole weighs as much as 4 million of our suns put together.

3.The oldest star in the Milky Way is at least 13.6 billion years old and most likely formed shortly after the Big Bang.

4.The Milky Way rotates at a speed of 168 miles per second. So, the actual place in space where you were an hour ago is now roughly 600,000 miles away.

5.The center of the Milky Way is full of mostly old stars. Its spiral arms contain more newborn stars.

6.Up to about 100 years ago, astronomers believed the Milky Way was the entire universe.

7.The Milky Way Galaxy contains an estimated 100 -400 billion stars, but these numbers are constantly changing as new stars are born and old stars die out.

8.It takes millions of years for a star’s light to reach our eyes, meaning you are seeing stars from long ago. Looking at the night sky is like looking back in time 100,000 years.

9.The sun is the closest star to Earth, but it is still located 4.24 light years away. It would take 70,000 years in our fastest spacecraft to reach the sun.

10.“Twinkle, twinkle, little star…” is a real song, but stars don’t actually twinkle. As the light of a star travels into your realm of vision turbulences in Earth’s atmosphere cause disturbances in the light’s path, creating the illusion that a star is twinkling.

11.The Brightest Objects In The Universe Come From Black Holes.

12.A Day Is Longer Than A Year On Venus.

13.It’s thought that, over the course of a year, 100 billion stars are born and die throughout the universe.