how did the sun evolve ?

Answer 1

It is a star - so it evolved like every other star did and will eventually run out. In billions and billions of years...

Answer 2

The Sun and all the planets(well, some) started out as a nebula such as the Orion nebula.(A nebula is this giant gas cloud)One place had mostly Helium (or hydrogen, I can never remember...) and started condensing.Then it started getting a rotund shape.It accumulated more and more mass until it was relatively large.One helium atom hit another helium atom and created hyrdrogen.This fusion reaction sparked another and another, so on and so on.It soon became a small star and was bright and hot and star stuff.The other clumps of stuff that was not helium condensed into rock or gas giants, since were not as big as the sun because the fusion reaction made it quite larger.The rock and gas giants went into orbit around the sun and the sun got larger and larger over time and the planets evolved and dinosaurs appeared and all that stuff happened and here we are today.

Answer 3

A cloud of interstellar gas (mostly hydrogen) was perturbed somehow -- a reasonably close supernova, a passing star, etc. that caused enough of the molecules of gas to clump together to start gravitational collapse. As more and more gas fell in to the center of the clump, the gravity got stronger and stronger, pulling more gas in faster and faster. The whole thing takes on the rotational energy of the galaxy, giving it spin and speeding up as it collapsed (conservation of angular momentum), and drawing in heavy elements, ices, and other gases that flattened out into a proto-solar disc (and eventually became the planets). When enough gas collected in the center of all this so that gravitational pressure got high enough, nuclear fusion lit off fusing hydrogen into helium, and the sun lit up. It's been fusing its hydrogen fuel ever since then (about 4.5-5 billion years ago), and will continue to do so for another 5 billion years or so.

For those religious people who posted their fairy tales: this is the science forum, take that to the religion one it has no place here. To those who say "nobody knows" -- yes, we do. We are watching the same process happening in other parts of our galaxy right now, we know with great certainty when and how our own star formed. It's taken hundreds of years of careful research and experimentation to figure all this out, but it HAS been figured out.

Answer 4

The sun 'evolved' as you put it from probably two or three molecules combining around 5/6 billion years ago, these attracted more and more molecules; mainly hydrogen, nothing much happened at first; but as more and more molecules joined into the ball the huge of wieght of them began to crush the centre; think of a human pyramid, the more people who join in the heavier it gets for the people at the bottom; except with billions upon billions (probably upon trillions too) more hydrogen atoms than there are people in the world. then two hydrogens fused together, realeasing energy this allowed under the immense pressure more hydrogens to join together to form helium; in the reaction below
Hydrogen + Hydrogen = Helium + masses of energy
This reaction continues to this day, and along with similar (Heilum + Hydrogen = Lithium) reactions have released billions upon billions of kilowatts of energy; so much so that every action you; or anything else on earth takes owes its power to billions of hydrogens fusing together, releasing energy. this reaction will continue for the next 5 billion years (give or take 1 or 2) until all of the hydrogen is used up.

Answer 5

1. Gas Cloud
2. Proto-sun
3. Main-sequence star (present)
4. Expansion to Red Dwarf
5. Outer layers gone
6. White Dwarf
7. Black Dwarf

Answer 6

The sun began as a nebula of hydrogen, a mix of proterium or deuterium. once the nebula became dense enough, it begins to glow hotter and hotter, and it begins to spin. eventually, it reaches a point where it is hot enough to begin the process known as nuclear fusion begins. the sun then gathered debris which began to spin around it quickly. the many planetoids crashed into each other and became larger planets. eventually, we had 9 (now 8) planets plus a ring of many planets we know as the astroid belt. this was the (theoretical) birth of the sun and the solar system.

Answer 7

The sun, like all stars, is a vast, controlled Hydrogen reactor, containing a continuous series of hydrogen bomb explosions, compressed by vast gravity forces holding together a compressed collection of hydrogen and helium gases, born out of the Big Bang which created the entire universe 15 billion years ago.

Answer 8

Willow's answer is very good, acept one thing: our sun is a "second generation star", meaning the gas cloud that it is made of is the result of a previous super-nova (the explosion of another star). all the planets, including earth, are made of the same gas. You can know that because the heavy elements you can find here can be aceated only in a super-nova.

Answer 9

The sun is a star. Research is still being done to find out exactly how stars form. The latest theory is the big bang when, it is suggested an unimaginable explosion took place and started time, energy, space and all the material in the universe which gradually formed stars.

Answer 10

Well Dear...................It's quite a long time since my school days, but I seem to remember that it is the Earth that evolves round the Sun..............or am I getting another senior moment?

You know, some days it's hard to tell your Earth from Uranus!

Only joking wee boy

Regards

Dorothy Mills (Mrs)

Answer 11

Look up Protostar, this is what is started from but it is a star close to the earth, just like any other. Personally I dont believe in evolution. God made it and thats that.