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- sir, i'm a new Astronaut and dont even understand the difference between different stars and how they come to be, you could teach me?
- Sure, stars come in many different sizes and temperatures. these determine a stars category. Stars could be low mass, medium mass, and high mass.
- stars first form in a nebula, there are different types like planetary nebula that is formed from medium mass stars, or supernovas caused by supergiant high mass stars
- all stars first start in a nebula and become protostars
- medium mass stars burn hotter and glow yellow and orange and forms shells of helium and berylium, later in life it eventually becomes a Red Giant through the layers it makes through nuclear fusion
- low mass stars usually live the longest, when they run out of hydrogen it slowly cools into a white dwarf
- once hydrogen begins to fuse to make helium stars start their main sequence which is 90% of a stars life
- high mass stars also go through the same first stage as every star, staring in the nebula and becoming protostars
- after medium mass stars go through their Red giant phase then the layers become unstable exploding into a planetary nebula, which is home to newborn stars, but the core remains a white dwarf
- once a medium mass star has become a white dwarf over time it will cool down into a black dwarf. We have never seen a black dwarf because our universe hasnt been around long enough to be able to create it
- high mass stars are extremely hot and shine Blue, they live very short lives compared to other types of Stars, they can fuse elements all the way up to iron before swelling up into Super Red giant. Because of all of the layers the star becomes unstable and explodes into a supernova which can be seen from galaxies away
- main sequence high mass star
- after a supernova, high mass stars don't turn into white dwarfs but could become a black hole, or a neutron Star
- Wow, thanks for teaching me all this new stuff, now i understand Stars and their different types
- Each type of star goes through specific phases throughout its life that we categorize into different sequences and types to identify each star in our universe
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