What is a supernova?

A bite size explanation of what causes stars to die in supernova explosions.

Transcript:
Supernova are one of the most powerful explosions in the universe, but what causes these giant stars to die so violently?

Stars are giant balls of plasma, which is a gaseous mix of ions and electrons. In the centre of stars, atoms fuse together to create new elements by a process called nuclear fusion. Nuclear fusion generates a lot of heat, creating an outward pressure. This pressure is balanced by the attractive force of gravity, which holds the star together. But over time nuclear fusion stops and the star begins to die, enabling gravity to take over and cause the star to fall in on itself. As the outer star collapses, it bounces off the denser core, sending material shooting off into space at 10% the speed of light. It sends shockwaves throughout the interstellar medium. But what's even more incredible is what's left behind after these cataclysmic explosions.

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Credits:
Written, animated and produced by Emma Osborne
Ident by Josef Brett

[ajunglajamirajungla]

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[carolmuranaka]

Great channel! (: ps: your necklace is gorgeous

[III-wynp]

When a big star explodes explodes into a supernova

[galeh]

well i searched up what the hell a supernova is and this pops up im like ok and it starts with "why do stars die violently?" im alll wooottt i still dont know whoat a supernova is. well i could figure it out but... and that obviously face smile fools no one. i showed to my lil sis who is 3 and she said, "why is she pretending to smile?" it was so funny

[galeh]

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[arfatansari]

U r Absolutely Geniuss🔝...U had tell us in video that no one knows what is there inside a black holes but its possible that the crreator knows everything n prophet muhammad SAW our speaks about black holes 1400 years ago n einstein discovery something about 20 century!Our Quran is the book of Signs .Just Read once in a lifetime .Its speaks about the rotation of planets the shape of earth the stolen light of moon many things...