The Sloan Great Wall is a massive structure of galaxies that spans over a billion light-years. It is the largest known structure in the universe.

Venus is the hottest planet in our solar system, with a surface temperature of over 450 degrees Celsius. This is due to its thick atmosphere, which traps heat.

Jupiter is the largest planet in our solar system, with a mass over twice that of all the other planets combined.

Proxima Centauri is the closest star to our solar system, located just over 4 light-years away.

Sagittarius A* is the name of the supermassive black hole at the center of our galaxy. It is estimated to be about 4 million times more massive than the Sun.

Ganymede is the largest moon in our solar system, and is even larger than the planet Mercury.

Pluto was once considered the ninth planet in our solar system, but was reclassified as a dwarf planet in 2006.

Ceres is the largest asteroid in our solar system, and is also classified as a dwarf planet.

Halley's Comet is the most famous comet, and is known for its long, flowing tail. It is visible from Earth every 76 years.

Hydra is the largest constellation in the night sky, covering an area of over 1300 square degrees.

Sirius is the brightest star in the night sky, and is located in the constellation Canis Major.

Andromeda is the closest galaxy to our own, and is located about 2.5 million light-years away.

IC 1101 is the largest galaxy in the universe, and is estimated to be about 10 times larger than our own galaxy.

The Big Bang Theory is the theory that explains the origin and evolution of the universe. It states that the universe began as a very hot, dense point and has been expanding ever since.

The CMB is the cosmic microwave background radiation that is a remnant of the Big Bang. It is a faint glow of light that fills the entire universe.