A degenerate gas is a state of matter that occurs at extremely high densities, where the particles, typically electrons, are packed closely together. In this state, the gas behaves according to the principles of quantum mechanics rather than classical physics. The pressure in a degenerate gas arises from the Pauli exclusion principle, which prevents identical fermions, like electrons, from occupying the same quantum state. This phenomenon is commonly found in astrophysical objects such as white dwarfs and neutron stars. In these stars, the gravitational forces are so strong that they compress matter to the point where degeneracy pressure counteracts further collapse. As a result, degenerate gases play a crucial role in the life cycle of stars and the structure of the universe.