Supernova (supernovae) | Stars, black holes and galaxies | Cosmology & Astronomy | Khan Academy
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Supernova (Supernovae). Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/supernova-clarification?utm_source=YT&utm_medium=Desc&utm_campaign=cosmologystronomy Missed the previous lesson? https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/lifecycle-of-massive-stars?utm_source=YT&utm_medium=Desc&utm_campaign=cosmologystronomy Cosmology & Astronomy on Khan Academy: The Earth is huge, but it is tiny compared to the Sun (which is super huge). But the Sun is tiny compared to the solar system which is tiny compared to the distance to the next star. Oh, did we mention that there are over 100 billion stars in our galaxy (which is about 100,000 light years in diameter) which is one of hundreds of billions of galaxies in just the observable universe (which might be infinite for all we know). Don't feel small. We find it liberating. Your everyday human stresses are nothing compared to this enormity that we are a part of. Enjoy the fact that we get to be part of this vastness! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Cosmology & Astronomy channel: https://www.youtube.com/channel/UChNPnEkW8LYZ5Rwi8_A2-DA?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Comments
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THAT IS EXCACTLY WHAT NEUTRON STARS ARE MADE OF
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If our solar system was formed from the remains of a supernova, how much time transpired between the supernova event and the formation of our solar system?
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The name "supernova" implies a lesser event called a "nova." In what way does a nova differ from a supernova?
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the conditions are completely different--they're unable to escape the iron core and they create a lot of pressure inside it that is released as the force holding them in is dissolved--check out "core bounce" lol--apparently the core becomes as dense as an atom and immediately becomes rigid like a solid and the collapsing exterior is rebounded outward
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Get a lot of elements then.
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my wife supernovas every time I come home late.
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That's really cool to think that a gold ring or a copper shield is a supernova remnant.
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What is more bigger: a supernova or VY Canis Majoris?
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at approximately 6:55 you state that stars with 9-20 times the mass of the sun can turn into a supernova. but the Chandrasekhar limit states otherwise. it tells that 1,5 sunmasses is enough for electron degeneracy to break down even ? anyways, thanks for this vid! very nice
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photons from the core may take thousands of years to escape the star
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so it actully happened 7500 years ago? 6500 light years away + 1000 years ago??
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stop picking on voyager, we all know he's a little slow, you don't need to keep mentioning it
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khan is awsame
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khan is so cool!!
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Question for you astronomy buffs- what keeps a neutron start from flying apart? If the pressure from the red giant was keeping it together, after it goes supernova shouldn't it fly apart? Or am I not understanding it correctly? Thanks.
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This video blows my mind. To think that we are here because of a 4 billion year old supernova.
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@khanacademy paper is no longer there
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I was always curious what exactly causes this large explosion, and I still don't get it. No one really knows it seems. For a star to go supernova, it needs a mass about 1.4 times the mass of our sun. So what is left behind after a supernova of a star ranging from 1.4-9 solar masses? Also out of curiousity, along with fusion in cores, positrons (antimatter) are produced with meet with free electrons and annihilate, releasing tons of energy. Is this more or less energy than fusion itself?
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@Sconz32 Take calculus. Learn limits.
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Beautiful in every way. Subject matter, delivery, everything. Thank you!
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