Why is the sun so bright?

Question

lol you guys crack me up!

It is because it studies hard and does it's homework.

lol

Answer 1

The sun is radiating about 4 x 1020 Megawatts of power into space, mainly as light and infrared energy (heat). It would quickly cool down unless the energy is replaced from some source.

The source of this power was one of the great mysteries of astronomy until the 1930s when it was realized that the key to understanding the Sun lies in the science of nuclear physics

Nuclear physics is the science of how nuclei (including protons and neutrons) interact with each other directly. It is quite different from chemistry which involves the reactions of the electrons in the atoms with each other. In chemistry the nuclei stay apart and distinct. In nuclear reactions the nuclei themselves are rearranged. In nuclear physics you change the elements. In chemistry you don't.

Nuclear reactions are uncommon on earth, except for natural radioactivity, which we will meet later.. You have to go to great lengths (physics lab, nuclear reactor, nuclear bomb) to get nuclear reactions to work.

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iii. Energy generation in the Sun
The type of nuclear reactions taking place on the Sun are called thermonuclear fusion. (Fusion = joining)

Thermonuclear fusion occurs when light elements of low atomic number combine to make an element of higher atomic number

Effectively, the process going on in the Sun is 4 hydrogen nuclei fuse together with 2 electrons to form a helium nucleus.

The major reason why nuclear reactions do not widely occur naturally is that nuclei are positively charged, so repel each other; nuclei have to be forced together. In the Sun the pressure and temperature are so high that the protons can blast their way through the force of the electric repulsion. On Earth the only way to do this is inside a hydrogen bomb

A lot of energy is given off when this happens. The energy comes from the destruction of some of the mass of the hydrogen.

About 0.7% of the mass just disappears. It is converted according to Einstein's formula

E=mc2
Each second 4 million tons of the sun is turned into energy, But there's enough fuel in the Sun (hydrogen) to last about 10 billion years, twice the current estimated age of the Solar System.

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iv. Transport of energy
All the nuclear reactions take place in the center of the Sun, which is the only place where the temperature and density are high enough. The photons that are generated carry the energy outward to the surface, but they are absorbed and re-produced billions of times in the journey. The energy actually takes millions of years to seep out of the sun Towards the surface heat is carried by convection, with hot fluid rising and cooler fluid falling.

Answer 2

You know how looking at an atomic bomb going off can blind you? Think about it -- the sun is 93 million miles away and we can feel its heat. That's got to be one pretty hot ball of gas, and it is cetainly the biggest hydrogen bomb that exists in our solar system. Luminosity (brightness) is a function of temperature. The sun's surface is thousands of degrees. The suns core is a 100 million degrees, the temperature it takes for nuclear fusion of hydrogen into helium -- one big sustained hydrogen bomb. It gives you pause to think that we can create a small sun right here on this planet. The fusion reaction can't be sustained, but even a little amount of this fused hydrogen can incinerate cities in a split second. I have read that if you could heat a dime to the core temperature of the sun, if would fry everyting in a 100 mile radius. You have to appreciate that cosmic forces are truly collosal. Like the temperature and density of the universe at the time of the Big Bang, or the gravitational and magnetic force of a neutron star. Google away.

Answer 3

Because the sun is in the major part of its life where it burns hydrogen atoms for about 10 billion years (the sun has about 5 billion years left before it becomes cooler and turnes into a white dwarf) to make helium atoms giving off radiation in form of heat, this process is called nuclear fusion.

Answer 4

actual, there is a few good reason to take a position the solar ought to were somewhat brighter as at the moment as 0.5 one thousand million years in the past. "Prehistoric" circumstances frequently refers back to the pleistocene, or any time before human writing began, type of 8 to 10 thousand years in the past. it isn't going the solar's output differed by technique of a measureable quantity between then and today. We actual don't have any way of understanding.

Answer 5

Some people are jerks.

The nuclear fusion reactions take place closer to the core. The energy released from such reactions yeilds tremendous energy in the form of photons.

Answer 6

Nuclear Fusion.

Answer 7

Think about how bright a nuclear explosion is. The entire sun is constantly having these nuclear explosions over the entire surface at all times. Yeah... that's why it's so bright.

Answer 8

Because it's a star and has tons of chemicals etc. I'm sure someone else can give you a better explanation...

Answer 9

Ray Ban and Oakley planned it that way

Answer 10

because it is nuclear fusion power, 25% stronger than nuclear fision