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- Stella nebulas first form a superhot gas known as protostar which are a key part in the creation of massive stars.
- Stage 1: Stella Nebula
- A typical giant molecular clouds are roughly 100 light years across and contains up to 6 million solar masses.
- Star formation starts with the gravitational collapse of stella nebulas.
- When these stars expand and cool, they do not brighten as dramatically as lower-mass stars.
- Stage 2: Massive Star
- Massive stars are larger than 8 solar masses.
- They are approximately 3 to 50x the mass of our Sun!
- Stage 3: Red Supergiant
- It is large and cool and so with some protective gear I can stand close to it!
- In more advanced term, they have spectral types of K and M meaning the surface temperature is below 4100K which is still hot enough to melt a human alive!
- It has the largest radius of all the star types!
- A supernova can outshine galaxies for days to months.
- Stage 4: Supernova
- The core collapses in less than a second as the gravity collaspes the star.
- Even I could not survive the outer layer of a star being blown into space so how is it a mere painting can withstand the impact?!
- For the final lecture, I will be staying very far away as no matter or information can flow out of the interior of a black hole according to classical general relativity.
- After a supernova, cores which execeed the Tolman-Oppenheimer-Volkoff limit, a fancy way of saying solar masses from 2.2 to 2.9 will become black holes.
- Stage 5: Black Holes
- These invisible eaters consume every matter in its path and not even light can escape once it has crossed a point known as the event horizon.
- Learn about Stars with Mr. Alien!
- That will be the end of today's lecture, I hope everyone took all of the notes as there were lots of information. See you all tomorrow!
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