The Soviet Union issued the first stamp featuring a galaxy in 1961, depicting the Andromeda Galaxy.

Spiral galaxies are the most common type featured on stamps, due to their visually striking and recognizable shape.

Messier 101, also known as the "Pinwheel Galaxy" or "Whirlpool Galaxy", is a spiral galaxy known for its prominent spiral arms.

IC 1101, also known as the "Hyperion Galaxy", is the largest known galaxy in the observable universe, with a diameter of approximately 4 million light-years.

The Andromeda Galaxy, also known as Messier 31, is the closest major galaxy to the Milky Way, located approximately 2.5 million light-years away.

The Milky Way Galaxy is the galaxy that contains our solar system and is home to billions of stars, including our Sun.

Messier 81, also known as "Bode's Galaxy", is a barred spiral galaxy known for its prominent bar structure across its center.

Messier 104, also known as the "Sombrero Galaxy", is a spiral galaxy known for its prominent dust lane that resembles a sombrero hat.

Cygnus A is a radio galaxy known for its powerful radio emissions and active galactic nucleus, which is a region of intense energy output at the center of the galaxy.

Messier 90, also known as the "Cartwheel Galaxy", is a ring galaxy with a distinctive wheel-like structure, resulting from a collision between two galaxies.

Messier 101, also known as the "Pinwheel Galaxy" or "Whirlpool Galaxy", is known for its prominent dust lanes and star-forming regions, giving it a distinctive spiral structure.

Messier 104, also known as the "Sombrero Galaxy", is often referred to as the "Black Eye Galaxy" due to its prominent dust lane that resembles a dark eye at the center of the galaxy.

Messier 104, also known as the "Sombrero Galaxy", is known for its distinctive elliptical shape and lack of prominent spiral arms, giving it a smooth and symmetrical appearance.

Messier 101, also known as the "Pinwheel Galaxy" or "Whirlpool Galaxy", is often referred to as the "Tadpole Galaxy" due to its distinctive tail-like structure, which is thought to be the result of a past interaction with another galaxy.

Messier 104, also known as the "Sombrero Galaxy", is known for its prominent central bulge and lack of spiral arms, giving it a distinctive elliptical shape.