Milky Way

Milky Way, catch taken in space simulator
SpaceEngine.

Milky Way is a barred spiral galaxy (Class SBc), it's the second largest galaxy in the local group and is the galaxy that contains our Solar System.

It's formed by clouds of gas, cosmic dust, dark matter, energy, planets and stars all these structures are linked by the existence of gravity and they revolve around the center of the galaxy

It has a mass of 0.8–1.5×10^12 M☉, a diameter of  126090 light-years and contains 270 billions of stars approximately, also it has 10668 Clusters and 12410 Nebulae.

Parts of the Milky Way are: Halo, Disk and Bugle.

Halo: It's made up mainly of Dark matter, Clusters and older stars.
Disk: The disk is composed of 8 spiral arms, they have most of the nebula, gas and dust in the galaxy and the younger stars.

Bugle: It's the central group of stars and contains the supermassive Black Hole Sagittarius A* (Sgr A*)

(If you want to know more about the supermassive black hole at the center of the galaxy press here).