A galaxy is a massive group of hundreds of millions of stars, all held together by gravity, orbiting around a common center.
The milky way is the galaxy in which our Sun, Earth, and planets exist. All stars visible to the naked eye from the earth also belong to our galaxy, the Milky way. Our sun is just a star in the Milky way.
There are billions of galaxies in the Universe. Some galaxies are small having only a million stars, while some others could have as many as 500 billion stars, or even more.
Why is the Milky way special to us?
The Milky way is the galaxy in which our Sun, Earth, and planets exist. The Milky Way is shaped like a huge whirlpool or spiral that rotates once every 200 million years. It is made up at least 100 billion stars, as well as dust and gas. It is so big that light takes 1,00,000 years to cross from one side to the other!
Scientists think that the center of the galaxy contains a super massive black hole that swallows anything passing too close. The Sun and its planets, including our Earth, lie in the quiet part of the Milky Way, about half way out from the center.
DO YOU KNOW : Andromeda Galaxy is one of our close neighbor, which is very close to the Milky way Galaxy, it is believed that Andromeda Galaxy might have planets like Milky way. Who know you may exist there (Lol!)