Red Giant Stars:
* Mass: Stars with masses roughly between 0.8 and 8 times that of our Sun.
* Process: As these stars age, they exhaust the hydrogen fuel in their core. The core contracts under gravity, heating up and causing the outer layers to expand and cool, becoming red giants.
* Fate: They eventually shed their outer layers, forming planetary nebulae, and their core collapses to form a white dwarf.
Supernova Stars:
* Mass: Stars with masses greater than 8 times that of our Sun.
* Process: These stars undergo a more dramatic end. As they age, they fuse heavier elements, ultimately reaching iron in their core. Iron cannot be fused to release energy, leading to a catastrophic collapse of the core. This collapse triggers a massive explosion, releasing an enormous amount of energy and heavy elements into space, creating a supernova.
* Fate: The core remnants of a supernova can become either:
* Neutron Star: A super-dense object composed of neutrons.
* Black Hole: A region of spacetime where gravity is so strong that nothing, not even light, can escape.
In summary:
* Mass is the key: The initial mass of a star determines its ultimate fate.
* Red giants: Lower-mass stars expand and become red giants, eventually forming white dwarfs.
* Supernovae: Massive stars end their lives in spectacular supernova explosions, leaving behind neutron stars or black holes.
