Spiral galaxies are the most common type of galaxy in the universe, accounting for about 77% of all galaxies. They are characterized by their flat, disk-like shape and their spiral arms, which are regions of intense star formation.

IC 1101 is the largest galaxy in the observable universe, with a diameter of about 6 million light-years. It is located about 1.04 billion light-years away in the constellation of Virgo.

The Andromeda Galaxy is the closest major galaxy to the Milky Way, located about 2.5 million light-years away. It is a spiral galaxy similar in size to the Milky Way and is visible to the naked eye from Earth.

The Milky Way is located in the Laniakea Supercluster, which is a vast collection of galaxies spanning about 500 million light-years. It is one of the largest superclusters in the observable universe.

Galactic collision is the process by which two or more galaxies merge together. This can happen when galaxies pass close to each other and their gravitational forces pull them together. Galactic collisions can result in the formation of new galaxies or the destruction of existing galaxies.

Abell 2029 is the largest known galaxy cluster in the universe, containing over 1,000 galaxies. It is located about 1.1 billion light-years away in the constellation of Hercules.

Cosmic expansion is the phenomenon that causes galaxies to move away from each other. It is believed to be caused by the expansion of space itself, which is driven by dark energy.

M87 is a giant elliptical galaxy located at the center of the Virgo Supercluster. It is one of the most massive galaxies in the universe and is known for its powerful jet of particles that extends for millions of light-years.

Sagittarius A* is a supermassive black hole located at the center of the Milky Way. It is about 4 million times more massive than the Sun and is surrounded by a dense cluster of stars.

M32 is a dwarf elliptical galaxy located closest to the Andromeda Galaxy. It is about 2.5 million light-years away from Earth and is a satellite galaxy of the Andromeda Galaxy.

NGC 3109 is a dwarf irregular galaxy located closest to the Small Magellanic Cloud. It is about 200,000 light-years away from Earth and is a satellite galaxy of the Small Magellanic Cloud.

NGC 185 is a dwarf elliptical galaxy located closest to the Large Magellanic Cloud. It is about 160,000 light-years away from Earth and is a satellite galaxy of the Large Magellanic Cloud.

NGC 5128 is a dwarf elliptical galaxy located closest to the Centaurus A galaxy. It is about 12 million light-years away from Earth and is a satellite galaxy of the Centaurus A galaxy.

NGC 1316 is a dwarf elliptical galaxy located closest to the Fornax A galaxy. It is about 60 million light-years away from Earth and is a satellite galaxy of the Fornax A galaxy.

NGC 1275 is a giant elliptical galaxy located closest to the Perseus A galaxy. It is about 250 million light-years away from Earth and is a dominant galaxy in the Perseus Cluster.