A galaxy is a huge system of stars. The white glowing path of stars across the sky is called the Milky Way galaxy. We in India call it Akash Ganga. It has millions of stars very close to one another. All planets revolve round the Sim and our Solar System. (Solar family consisting of the Sun, the Planets, the Satellites, Asteroids and Meteoroids) move along our galaxy, the Milky Way (Akash Ganga).