PHYSICS - Astrophysics - Lifecycle of a star

The video explains the life cycle of stars, starting from their formation in stellar nebulas. Stars form when dust and gas spiral together under gravity, eventually becoming hot enough for nuclear fusion. This leads to the main sequence phase, where stars remain stable for millions to billions of years. Smaller stars, like our sun, eventually become red giants, then white dwarfs, and finally black dwarfs. Massive stars, however, become super red giants and may end in a supernova, forming either a neutron star or a black hole. The video highlights that all elements heavier than iron are formed in supernovae, emphasizing that we are made of stardust.

What is the initial stage of a star's formation?

Explain the process of nuclear fusion in stars.

How does a star become a red giant?

What occurs during a supernova?

What are the two possible outcomes after a supernova?