Black Holes

Reviewing back...

-Heather R. Smith/NASA Educational Technology Services

www.nasa.gov

Everybody knows that The Universe has many secrets, and we cannot comprehend it as ourself. It needs big technology even NASA still cannot find out more about Universe. This article is part of the NASA Knows (Grade K-4) series where it describes of what Black hole is.

Black hole is a thing that place in space where can pull everything in just like vacuum cleaner. The gravity inside there is very strong, so everything that had been inside there cannot get out. Black hole is invisible. Because no one and light can get out, people can't see black holes. The largest Black hole is called Supermassive, the medium Black Hole is called Stellar, and the smallest Black Hole is called Tiny Black Hole.

According to scientists, Supermassive has masses more than 1 million suns together. They found that every large galaxy contains a Supermassive black hole at it center. Such as the Supermassive in Milky Way Galaxy, Sagittarius A, has masses equal to about 4 million suns together. Supermassive formed at the same time as the galaxy formed too. Stellar has masses more than 20 times of masses of the sun. There are might be many Stellar Black Hole in Earth's galaxy, Earth's galaxy is called the Milky Way Galaxy. The Staller black holes formed when the center of a very big star collapses and it made exploding, it is called as Supernova. Tiny Black Hole has masses equal to about mountain, and it is as small as one atom. The smallest black hole formed when the universe began.

As the amazing of gravity in Black Holes could a black hole destroy earth? Or could Earth get into black hole? According to NASA, black holes do not go around in space eating stars, moons, and planets. Earth will not fall into a black hole because no black holes is close enough to the solar system.

In my opinion Universe is a still mysterious thing in this world, and no one can reach out it except you have very high technology such as NASA. And these all things makes me realize that we are just like a small thing and don't have meaning anything from the biggest outside there.

by Dini Dwintika Karuniati

16611042

Article Science