Our galaxy | Milky way
Milky way is our home galaxy. It is a normal spiral galaxy.
Size of milky way is about 120,000 light year. There is over 200 billion stars in the galaxy.
As most other galaxies, a giant super massive black hole is sitting in the center of Milky way. The name of the center black hole is Sagittarius A*.
Milky way is a middle weight galaxy. The largest known galaxy IC 1101 has over 100 trillion stars and other big galaxies can have more than a trillion stars.