where do stars come from?

Question

I heard that stars get created in something called a star nucery i think if this is right how?

Answer 1

This is a BIG question, and scientific books have been written about it. Here is my attempt a quick explanation:

Here on earth, we tend to think of matter being solid or liquid, like the rocks and the sea; and the atmosphere makes up only a tiny part of the earth (but is essential to us!).

Out in space, it is a different story, and nearly all matter is made up of hydrogen, with a small amount of helium, and a trace only of all the other elements we are familiar with here on earth. Between the stars, space is nearly empty, with a very small amount of hydrogen gas. Between the galaxies, the density of gas is even less, and is actually much less dense that the very best vacuums we can make here on earth.

But here and there within galaxies, the hydrogen gas is present in larger quantities as gas clouds, and can gradually clump together under gravitational attraction. If these regions contain enough gas to form stars, they are referred to as 'star nurseries'.

As a cloud of gas is compressed under gravitational attraction, it heats up (think how a bicycle pump gets hot when you compress the air when inflating a tyre.) Eventually, if the gas cloud is large enough, as it condenses it heats up to a temperature of millions of degrees; hot enough for the densely packed hydrogen gas to start a nuclear fusion reaction, transforming into helium, and giving off tremendous amounts of radiation. For this to occur, the amount of gas available has to be very large, or else the heat won't become great enough for the nuclear fusion to start. If the amount of hydrogen is great enough to cause nuclear fusion, a star forms. The amount of hydrogen is so great, that the reaction will continue for millions or billions of years. Our own sun will contnue to convert hydrogen into helium for billions of years yet, before it uses all its hydrogen fuel.

Answer 2

Clouds of hydrogen gas many light years in diameter are triggered at some point to cause a clump of molecules to gather in one spot, this creates a gravitational attraction that slowly draws more molecules to it, over the course of a few million years this great cloud begins to contract towards this area, as the mass increases at this point the process speeds up and great pressure develops, due to gravity, the gas is compressed, raising the temperature. This rapidly gets to the point where the temperatue is now high enough to cause hydrogen atoms to stick to each other, fusion has begun, hydrogen is converted into helium, and a star is born. With fusion comes radiation, this radiation exerts an outward force which slows down further compession of the hydrogen and finally overcomes it, the star is now stable and will remain so until hydrogen fuel becomes scarce, this take billions of years to reach this stage, radiation pressure decreases and gravity kicks in once more, further compression takes place and the helium begins to fuse into a higher element, more radiation once more stabilizes the star. This process continues until no more fuel is availabe, this is the final stages of a star's life. Our star is expected to have a life span of eight billion years.

Answer 3

Please do more research in advance. And the spelling is "nursery".

Your question requires a lengthy answer to be adequate.

Molecular clouds, which are the origination of many stars, are very difficult to study because they are primarily composed of molecular hydrogen at temperatures only about 10 degrees above absolute zero. Since hydrogen is virtually invisible under those conditions with normal detection methods, 99% or more of a molecular cloud cannot be seen with standard methods. Prior studies have had to rely on using radio telescopes to detect trace molecules such as carbon monoxide or ammonia in these clouds and then using this information to determine indirectly the distribution of molecular hydrogen. Advances in IR detection give, now for the first time, a way to peer directly into the center of such stellar birthplaces.

As an example, the images of the Large Magellanic Cloud, about 170,000 light years distant and 150 light years across called N 119, show a central region of starbirth, which is a nebula called the Papillon Nebula (because of its shape: papillon is the French word for "butterfly"). Stellar winds from hot newborn massive stars within the nebula are responsible for the ridges, arcs, and filaments. One possible explanation for the unusual shape of the Papillon Nebula is that there are massive stars (10 solar masses or more) forming in the nebula and the radiation pressure from these stars is halting the infall of gas onto these stars and directing it away in a bipolar outflow.

It isn't just a simple, straight-forward process because of all the adjacent "players".

Answer 4

Stars are created when gravity pulls together enough matter at a high enough temperature and pressure for nuclear fusion to begin. Areas of space with the right conditions for this to happen have been called "star nurseries".

Answer 5

There is a lot of "loose" matter in the universe. In the "star nurseries" this matter comes together to form new stars. Some of this matter is left over from stars which have exploded and died.

Answer 6

Had to give you a star for this question!! If anyone can answer this question with the truth then I will be totally amazed.
it is a subject that has driven people mad, and I believe we will never know the answer

Nrao claims to know ask him where hydrogen comes from!

Answer 7

in the milky way galaxy , the star forming regions are where the spiral bands of the milky way pass through intergalactic space. as the milky way rotates, the bands cross through intergalactic space and act as a magnet to collect hydrogen. of course when a heavy gravitational force travels through space, it will attract anything , and what is anything in intergalactic space? , will be hydrogen, and when there is enough hydrogen in one place, hydrogen clouds start to condense and boom, a star or stars are born.

Answer 8

the origin of stars was formed from what we call the big bang, in which everything is in what we call the universe, and the universe is so big that we don't have clue what the universe is in.

Answer 9

Space!

Answer 10

A very debatable question. Whether they come from God or not. I'm sure there is also a scientific explanation and components that will answer your ? today or sometime in the future. GL