Stars generate energy through nuclear fusion reactions in their cores, where hydrogen atoms are combined to form helium, releasing enormous amounts of energy.

A star's life begins as a protostar, a dense cloud of gas and dust that collapses under its own gravity, forming a hot, luminous core.

Main sequence stars, like our Sun, fuse hydrogen into helium in their cores, maintaining a stable balance between gravitational collapse and outward pressure.

As a star runs out of hydrogen, it expands and becomes a red giant, fusing heavier elements in its core and shedding its outer layers.

Massive stars, after undergoing a supernova, can collapse under their own gravity, forming either a black hole or a neutron star, depending on their mass.

Low-mass stars, after expelling their outer layers, leave behind a dense core called a white dwarf, composed primarily of carbon and oxygen.

Neutron stars, formed from the collapsed cores of massive stars, possess extremely rapid rotation and intense magnetic fields.

Stars emit energy as stellar radiation, which includes visible light, ultraviolet radiation, infrared radiation, and other forms of electromagnetic waves.

A supernova is a catastrophic explosion that occurs when a massive star reaches the end of its life, releasing enormous amounts of energy and matter into the surrounding space.

Main sequence stars, like our Sun, have relatively low masses and can spend billions of years fusing hydrogen into helium, resulting in a long and stable lifespan.

Neutron stars are the collapsed cores of massive stars that have undergone a supernova, consisting almost entirely of neutrons.

During the red giant phase, stars exhaust their hydrogen fuel and begin fusing heavier elements in their cores, including carbon and oxygen.

Planetary nebula formation occurs when a star ejects its outer layers, revealing its hot core, which emits intense ultraviolet radiation, causing the expelled gas to glow.

Neutron stars are incredibly dense objects formed from the collapsed cores of massive stars, where neutrons are packed together under immense pressure.