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 of 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 sides 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.