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- Wow! what is that big teal thing in the sky?
- How do you know if it will turn into an average star or a massive star?
- Great question! lets go find one and ill tell you all about it!
- Thats a Stellar Nebula! A stellar nebula is the start of a stars life, it just depends on if it turns into an average star or a massive star
- We found an average star! An average star is created when the gas and dust starts to collapse inside of the stellar nebula and causes the inner core to heat up. Once the core is hot enough to ignite nuclear fusion, a star is born
- let me show you!
- No way! Thats so cool, what happens after the average star?
- This is what's called a red giant. It's the next stage in a stars life after all the hydrogen fuel has run out and stopped powering the nuclear fusion. It maintains its stability through a balance between gravity and pressure to keep it burning.
- Thats actually tells us a little bit about the temperature. Due to the star running out of hydrogen, the star will usually cool off and become about 2200 - 3200 degrees celsius
- Thats so cool but why is the star a reddish colour now?
- Wait is that another star I see?
- It is! I didnt even notice that! That looks like planetary nebula! A planetary nebula is the next stage of a stars life. After the stars nuclear fusion is completely burnt out it starts ejecting layers of matter, those layers are what become the planetary nebula
- Lets get a closer look!
- Im glad we came over here, we can see it better from this part of the ship
- This actually means that it is much hotter than the other stars at a degree of about 10000
- yup there's one more stage! Lets check it out!
- The planetary nebula is a blue ish colour what does that tell us about the temperature
- wow and then what happens after the planetary nebula? Is there another star after that?
- This is the last and final stage of a star cycle. A white dwarf! The white dwarf is what's left under the planetary nebula once it sheds its layers. Its a very small, dense star but its also the hottest as you can see now the colour is white
- Yup! or a neutron star!
- Thats so cool! omg! and im guessing after this star it'll turn into a black hole?
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