For stars less massive than about 8 times the mass of our Sun:
* White dwarf: A dense, hot, and incredibly small remnant (about the size of Earth). It's composed mainly of carbon and oxygen.
* Planetary nebula: The outer layers of the star are ejected into space, forming a beautiful, expanding cloud of gas and dust.
For stars 8 to 20 times the mass of our Sun:
* Neutron star: A tiny, incredibly dense object (about 12 miles in diameter) composed mostly of neutrons. It spins rapidly and has a powerful magnetic field.
* Supernova remnant: Similar to a planetary nebula, but much larger and more energetic, containing the debris from the explosion.
For stars over 20 times the mass of our Sun:
* Black hole: A region of spacetime where gravity is so strong that nothing, not even light, can escape. Black holes form when the core of a massive star collapses under its own gravity.
* Supernova remnant: Similar to the remnant for less massive stars but much larger and more complex.
Other possibilities:
* Magnetars: A type of neutron star with an extremely powerful magnetic field.
* Pulsars: A rapidly rotating neutron star that emits beams of radiation.
It's important to remember:
* The exact outcome of a supernova explosion can vary depending on factors such as the star's initial mass, composition, and rotation.
* The material ejected from a supernova explosion can enrich the surrounding interstellar medium, providing the building blocks for new stars and planets.
* Supernova remnants are fascinating objects that astronomers study to understand the evolution of stars and the universe.
