Friction is not a fundamental force in astrophysics. The fundamental forces are electromagnetism, gravity, and the nuclear force.

The Great Wall is the largest known structure in the universe, stretching over billions of light-years.

Supernovae are responsible for the formation of heavy elements through the process of nucleosynthesis.

The Big Bang Theory is the prevailing cosmological model that describes the expansion of the universe.

Neutron stars are the remnants of massive stars that have undergone a supernova explosion.

The James Webb Space Telescope is the largest and most powerful telescope ever built.

Pulsars are rapidly rotating neutron stars that emit radio waves.

Plasma Physics describes the behavior of matter under extreme conditions of temperature and density.

Nebulas are vast clouds of gas and dust where stars are formed.

The nuclear force is the force that holds atomic nuclei together.

White dwarfs are the remnants of stars that have exhausted their nuclear fuel.

Stellar Evolution Theory describes the evolution of stars from their formation to their final state.

Active Galactic Nuclei are the sources of intense X-ray emission in the universe.

M87 is the largest black hole known to exist, with a mass billions of times that of the Sun.

Protoplanetary disks are the disks of gas and dust around young stars where planets are formed.