What is Galaxy?

The Short Answer:

           The Galaxy is a huge collection of gas, dust, and billion of stars and solar systems, all held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle.

(A supermassive black hole is the biggest kind of black hole. Its gravity is more than a million times stronger than our sun's, Its has very strong gravity that pulls in everything around it.)

            We live on a planet called Earth that is part of our solar system.

But where is our solar system? It's a small part of the Milky Way Galaxy.

 

live view of Galaxy by NASA.

Hubble Skymap

Planets in our Galaxy ?  

Mercury : The swiftest planet.

Venus    : Earth's superheated twin sister.

Earth     : Our home world.

Mars     : The Red Planet.

Jupiter  : Kind of the planets.

Saturn  : Jewel of the solar system.

Uranus  : The original ice giant.

Neptune  : The farthest planet in our solar system.

Pluto  :  A small world with a bid heart.

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