How does a lot of hydrogen just get together randomly and form a sun?
Same for a bunch of dust forming planets and moons?
I'm not trying to make a religious point here, I'm just curious.
- 1 month ago
Since space is a vacuum a cloud of gas is just floating in there. A slight disturbance (a far supernova) that disturbs it a little bit can be enough to create a pocket where is a little bit more gas than elsewhere. The tiny amount of a little bit of gravity this pocket has more than the rest of the gas will attract those gasses around it. So, then more gas will collect at the same place, the thing gets heavier and heavier and draws even more gas. This process starts very slowly but once it started it will not stop until the supply of gas ends. Planets form the same way, but on a smaller scale. So once the pressure and heat inside this gas bubble has been raised to a certain temperature nuclear fusion will happen and a star has been born. Actually a quite simple process.
- Bulldog reduxLv 71 month ago
Current scientific opinion holds that dust particles were drawn together by electrostatic forces to form larger particles. Once the mass of the larger particles reached a critical size, gravity took over to eventually form stars and planets and moons.
- 1 month ago
Gravity, electro-static charge and gravity, plus a lot of time.
- vorenhutzLv 71 month ago
Well it's different processes at different scales, but the basic idea is that initially small density fluctuations were pulled together by gravity. Formation of galaxy clusters seems to be helped along by dark matter, stars by the cooling of gas clouds, and planets by dust accretion.Source(s): https://en.m.wikipedia.org/wiki/Cosmic_microwave_b... https://en.m.wikipedia.org/wiki/Structure_formatio... https://en.m.wikipedia.org/wiki/Star_formation https://en.m.wikipedia.org/wiki/Nebular_hypothesis...
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- 1 month ago
Gravity and electrostatic attraction will begin the process; as the tiny bits and chunks attract more, the gravity increases, and pulls in more mass from the cloud.
- ANDYLv 51 month ago
It takes a lot of time for a nebula in order to form a dense zone of protons (hydrogen). Gravity would then increase enormously in a short time if a supernova takes place next to this nebula, thus compressing the gas and augmenting the heat. This will reach a certain temperature and pressure where protons, positively charged, will not repel anymore but fuse (usually 15 million degrees). The fusion reactions will eventually give off energy and radiation when a helium nucleus is achieved. This energy is the outcome of what is called "mass defect", which is a loss of mass of 0.7% as regards to the original 4 protons that developed the helium nucleus.
So as you see, it is not really a random get together as you say. It takes discrete amounts and movements to obtain a star.
- CliveLv 71 month ago
Gravity, that's all. Even if it's all evenly spread, if it's free to move, there will become denser areas of gas, and their gravity will pull more towards them... so the gas clumps together, heats up and becomes stars.
Gas and dust will tend to not move straight in to these clumps because it's already moving in its own direction, so unless that direction just happens to be directly toward a clump, it will spiral in and you get a spinning cloud where a star is forming in the middle. Smaller clumps will also form further out in the cloud and they become planets and other objects.
What does religion have to do with it?
- D gLv 71 month ago
the suns are created when a spinning disk of gas gets a small group of atoms of hydrogen
the few atoms of hydrogen ACTUALLY have gravity
say its 4 atoms of hydrogen
the 4 collect a fifth
then the five collect a sixth
and then six collect a seventh
this continues and then groups can attract groups
so the seven could attract a collection of 3 hydrogen
this continues untill there is enough hydrogen to produce pressure to fuse the two hydrogen
there are also hydrogen that is not grabbed by the sun .. such hydrogen forms the outer planets
- SkyLv 71 month ago
Gravity. It's nothing more than gravity bringing it all together, and the crushing pressure when there's enough of it causes it to heat up to the point of nuclear fusion. This is basic grade school level science.
- 1 month ago
Gravity + time = Condensing cloud of gas
As gas condenses, pressure increases. As the pressure increases, the temperature increases. As the temperature increases, so does the kinetic energy of the gas. Eventually, the velocity of the particles is high enough to overcome their magnetic repulsion and fusion happens. And then that's all she wrote, because now you have a star.
Nothing mystical, nothing magical, nothing unbelievable. The general concepts are pretty straightforward physics that you can learn in high school.