cause they r happy
2006-10-14 23:25:24
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answer #1
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answered by sleepwalker69 6
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If you have a bonfire in your garden, you will have a good blaze, the fuel is used up, and then the fire will die down and you go to bed.
But if you come out later you will find that not all the fuel has been used and little bits suddenly blaze up and then die. This can continue for some days. This burning uses the 'Electric Force' to convert the wood to carbon dioxide and water.
The universe is a bit like that. There was a good old blaze up very early on (known as the big bang), and now little clumps of unused fuel get together, heat up as they contract under gravity, and when they are hot enough start 'burning' their unused hydrogen. They use the 'Weak Nuclear force' to turn the hydrogen into helium. This releases energy that keeps the fire going.
We do not know if all the fuel in the universe will be used up in time.
2006-10-15 00:49:35
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answer #2
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answered by Rufus Cat 3
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Stars do give off light, that's why we can see them far away. The Sun, which is just an ordinary star, gives off the light that allows life to exist on Earth. Stars give off light the same way the filament in a light bulb does. Anything that is hot will glow. Cool stars glow red, stars like the Sun glow yellow, and really hot stars glow white or even blue-white.
2006-10-14 23:36:48
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answer #3
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answered by anitha 4
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The process that causes stars to shine is the same one that we have harnessed for use as a weapon: nuclear fusion.
Stars start as huge regions of gas, mostly hydrogen. This gas will start to contract, and it heats up. As it contracts, its temperature rises. When the heat gets high enough, it causes the individual hydrogen atoms to collide and combine into helium with the release of energy.
It’s called fusion, because it fuses smaller nuclei into bigger ones. It releases enormous energy. The stellar gas, now in a spherical shape, is contracted further by gravity while exploding by fusion. Together, a balance is reached and a star is born. The energy released in the star’s center makes its way to the surface, where it is radiated into space as light, heat x-rays, ultraviolet light and radio waves.
Eventually, a star will use up all of its available small atoms, and the fusion energy is no longer available. In some stars, the further collapse triggers fusion of helium into carbon, or carbon into even heavier elements. Finally, all the elements that can provide energy are exhausted, and the star starts its final collapse.
Hope that answers your question
2006-10-14 23:41:04
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answer #4
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answered by ravana 1
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the glowing effect we see from stars, or any light source, is only how our brain tells us that we detect the radiating energy from the sorce. if our bodys were designed diferently, in a sence lets say if we detected light by hearing the radiation, then we would hear a lot of static in the day and still some from the stars at night. but our eyes are highly tuned to "show" us the exact location, intensity, and "frequency" of the radiation. it's all in how you look at it.
2006-10-16 18:00:30
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answer #5
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answered by bishop 1
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Stars glow because they they give off light. Big stars like the sun doesn't only glow but they also blow! When they blow they can devour all planets near them. I think the biggest and the brightest star is the LBV 1806-20 which is 150 times larger and 5 million times brighter than the sun.
2006-10-14 23:44:46
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answer #6
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answered by GUWAPU 1
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Stars are giant balls of glowing gas. Stars shine because the gas inside them is so hot that a process called "nuclear fusion" takes place. Nuclear fusion is where 2 atoms come together (or "fuse") to form a different kind of atom; this process gives off a lot of energy that we can see as light.
:8)
2006-10-14 23:31:01
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answer #7
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answered by ☺♥? 6
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because they are big masses of hydrogen and the burning is the reaction as it turns into helium. As the burns it releases light in the form of energy called neutrinos... these particles always travel at the speed of light and even after the star dies it will continue to travel and glow on.... some of the stars you see in the sky are not even there anymore... but since the light has traveled for say 50 billion years to get here... we still see it burning as though it were still there
If the stars didn't emit light and establish such high temperatures to support these reactions inside.. well then it would not generate the electro magnetic field to keep it sustained. In other words, the only reason the sun doesn't collapse and its remains scatter about and cool off is because the "burning" fights off gravity keeping it condensed. When the "burning" subsides to a low degree the sun will succumb to gravity and be ripped apart in a great super nova... or simply die and re condense and form another star one day
Light is how the sun emits energy... like a nuclear bomb which cuts atoms in half and in half that it generates alot of energy... a sun fusses and splits atoms constantly due to its high temperature. The center of the earth is also similiar to the sun... although its composition allows much lower temperature levels... so the outer layer is cool enough to harden and accumulate elements from comits and asteroids and other space debree. So the "burning" you see is a natural process of nature ingesting energy and re-emitting it out as a newer and more condensed element. Now the earth isn't a sun... at all... but the earth's core and the sun has a relation in terms of its function.
The periodic table of elements shows this flow of energy... under the right conditions elements can be processed and made into another element(s). Stars happen to be made of the first element making another base element... the first building blocks. These elements are much more abundant and therefore dominate.
Eventually when a sun dies it expands and collapses sending its material splashing outward like a balloon expanding then popping. The material at the tip of the wave will keep going and reach the outside of the solar system. Another reason we see lights is because of what happens here. In between the solar systems, just outside the suns influence is a current of dead star material. This material is deffinately a crucial building block much like water cycles here on earth. Scientist do not know what its purpose is yet but speculate it helps fuel the expansion of galaxies. The material stays warm because fresh nuetrinos keep older nuetrinos warm and this keeps them moving at the speed of light. As light approaches the edge of the universe there are less suns and therefore less points of gravity. The material then slows here over time (red-shift) because there are less newly made nuetrinos to warm the old ones and less gravity (magnetic fields) to pull them. The material probably reaches points of build up... much like a busy intersection on a major road. There is a big event much like a multi-car pile up. This mix of elements aided by the speed of the material provides the necessary force to condense gas. A swirling motion takes place untill one of the right mixtures is made and ignites in what I personally feel is a gamma-ray burst. However that last bit was purely my own thoughts. But gamma-ray bursts are the brightest light in the universe and last only seconds. They are so radio active that our ozone layer would collapse and we would be baked like over cooked cheese in the microwave.
2006-10-14 23:31:43
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answer #8
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answered by Anonymous
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A star is a massive body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. Unlike a planet, from which most light is reflected, a star emits light because of its intense heat. Scientifically, stars are defined as self-gravitating Go to ask.com.
2006-10-14 23:38:01
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answer #9
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answered by greylady 6
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check out the link below to see more information as well as animated graphics. showing how hydogen effect the stars to poduce colors
""Stars are much hotter than stoves, but they also give off light because of their temperatures. Just like stoves, stars give off most of their light in a certain color depending on their temperature. If you look closely at stars in the night sky, you can see some of these different colors (and they can be quite stunning through binoculars or a small telescope
However, not all the light that stars give off reaches us. Some is absorbed by the gas in the star's atmosphere
Hydrogen will only absorb light if the star is at the right temperature. If the star is too hot or too cool, the hydrogen will not absorb this light.
Sometimes, hydrogen clouds in stars give off as well as absorb light. When a hydrogen cloud gives off light, it gives off light exactly the same color as the cloud absorbs. If the cloud gives off more light than it absorbs, the spectrum "
2006-10-14 23:32:29
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answer #10
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answered by Wicked 7
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They're not "glowing", they're emitting light. Large clouds of hydrogen gas collapse and condense due to gravitational forces. If there's enough mass, "ignition" will occur in the core due to immense pressure, setting off fusion reactions. If there isn't enough mass, you'll end up with a large gas planet such as Jupiter, which is essentially a "failed" star.
UPDATED RESPONSE:
You gotta love the preteen "Einsteins" that thumbs down an absolutely correct answer. Look, if you're a moron, or a preteen....get lost. Post in the "Celebrity" forum, or some other frivolous nonsensical forum.
The collective IQ on Yanswers seems to be around 75 or so.
2006-10-14 23:30:14
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answer #11
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answered by Anonymous
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