BrightShinyGirl
Abusive Little Bitch
- Joined
- Nov 22, 2013
- Posts
- 11,572
More about the mechanism behind supernovasThe religious teachings are wrong about the origin of the universe.
Hydrogen atoms fuse when they’re smashed together fast enough. Too slow and electrostatic repulsion makes them bounce off each other.
Fusion bombs use inertial confinement. Their fission bomb primary heats up the lithium secondary so fast the lithium atoms don’t have time to ricochet away.
In a star, gravitational confinement keeps the hydrogen atoms tightly packed, when they bounce off each other they can’t go very far without hitting another tightly packed atom. With trillions of collisions per second, a few will succeed in triggering a fusion reaction, releasing energy.
More energy means faster-moving atoms in the star’s core which are more likely to fuse with neighboring atoms — a chain reaction.
Eventually the star settles into a steady state with a continuous fusion reaction at its core. (This is happening in our sun right now).
After millions of years the waste products of fusion, heavy elements, like carbon, oxygen, iron, and gold build up in the core.
Ultimately this triggers a supernova, destroying the star and dispersing these heavy elements, which billions of years later will coalesce through gravity into solid planets and living creatures like you and me.
When a star is burning normally, the fusion reaction at it's core inflates it, driving much of the remaining hydrogen fuel into its outer shell. This is the state our sun is in currently.
But eventually the fuel runs out. When all the lighter elements have been fused into iron the fusion reaction stops. The resulting drop in pressure causes the outside shell to fall inward, creating a shockwave as it bounces off the iron core. This shockwave disperses the outer shell.
What remain afterward depends on how big the star was to start. A medium-sized star leaves behind a neutron star--a superdense sphere of pure neutrons. (Since they don't have a static charge they can be packed more densely than normal atoms).
Bigger stars collapse into black holes. We don't know exactly what's inside a black hole. Their gravity is so strong that not even light can escape. It might just be a big neutron star, or some form of exotic matter like a quark-gluon plasma.
The real universe is so much cooler than fantasizing about fairies and dragons.
