In the early universe, elliptical galaxies were the dominant type of galaxy. They are characterized by their smooth, featureless appearance and lack of spiral arms.

Galaxy collision is the process by which two or more galaxies merge together. This can happen when galaxies pass too close to each other and their gravitational forces pull them together.

Star formation is the process by which stars form in galaxies. This happens when large clouds of gas and dust collapse under their own gravity and begin to form stars.

The Hierarchical Clustering theory is the theory that explains the evolution of galaxies. It states that galaxies form through the hierarchical merging of smaller galaxies.

IC 1101 is the largest galaxy in the observable universe. It is a supergiant elliptical galaxy located about 1.04 billion light-years away in the constellation Virgo.

The Sagittarius Dwarf Spheroidal Galaxy is the closest galaxy to the Milky Way. It is a small, faint galaxy located about 70,000 light-years away in the constellation Sagittarius.

The Virgo Supercluster is the supercluster that contains the Milky Way. It is a large, rich supercluster located about 50 million light-years away in the constellation Virgo.

The Cosmic Microwave Background Radiation is the cosmic microwave background radiation that is left over from the Big Bang. It is a faint glow of radiation that fills the entire universe.

The Dark Energy theory is the theory that explains the acceleration of the universe. It states that there is a mysterious force called dark energy that is causing the universe to expand at an accelerating rate.

The BOSS Great Wall is the largest structure in the universe. It is a massive filament of galaxies that is about 1.3 billion light-years long and 400 million light-years wide.

The Cold Dark Matter theory is the theory that explains the formation of the first stars and galaxies. It states that the universe is made up of about 27% cold dark matter, which is a mysterious substance that does not emit or reflect light.

Galaxy evolution is the process by which galaxies evolve over time. This can happen through a variety of processes, such as galaxy mergers, galaxy interactions, and star formation.

The Big Bang theory is the theory that explains the evolution of the universe. It states that the universe began about 13.8 billion years ago with a very hot, dense state and has been expanding and cooling ever since.

The Hierarchical Clustering theory is the theory that explains the formation of the Milky Way. It states that the Milky Way formed through the hierarchical merging of smaller galaxies.

The Nebular hypothesis is the theory that explains the formation of the solar system. It states that the solar system formed from a rotating cloud of gas and dust that collapsed under its own gravity.