"The Sun, through all the planets revolving around it, and depending ~ above it, can still ripen a bunch that grapes as though it had actually nothing rather in the world to do." ~ Galileo


You are watching: In which of the following layer(s) of the sun does nuclear fusion occur?

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Mass: 1.989x1030 kg Radius: 695,000 kilometres (equator) median Density: 1.410 gm/cm3 Rotation Period: 25 - 36 job to escape Velocity: 618.02 km/sec Luminosity: 3.839 x 1026 watts magnitude (Vo): -26.8 surface ar Temp: 5,780 K (mean) Age: 4.5 billion years

In the main point of the sunlight hydrogen is gift converted right into helium. This is called nuclear fusion. It takes 4 hydrogen atom to fuse into each helium atom. During the process some the the fixed is converted right into energy. fixed of 4 H atoms: 4.03130 AMU mass of 1 that atom: 4.00268 AMU 1 atom Mass Unit (AMU) equals 1.67x10-27kgs The difference between the mass of 4 H atoms and 1 he atom is 0.02862 AMU i beg your pardon is just 0.71% that the original mass. This small portion of the fixed is converted into energy. If 4 grams (1/8 ounce) that H are converted come He, just 2.8x10-3 grams the the massive is convert to energy: how much power is generated from converting such a small amount of mass? We can calculate by utilizing Einstein"s famed formula. E = mc2 E = (2.8x10-3 grams) x c2 E = (2.8x10-6 kgs) x (3x108m/sec)2 E = 2.6x1011 joules Enough power to keep a 60-watt light bulb shining for over 100 years! The sunlight has different layers with different properties, this layers room composed of material that is around 75% hydrogen and also 25% helium through mass. Simply put, the sunlight is a great ball of gas, hot sufficient to light in every tier. In the really innermost part of the Sun, referred to as its core, the temperature is about 15 million Kelvins, the density is 150 times that of water, and the pressure is end 200 exchange rate times greater than atmospheric pressure here on Earth. This heavy, sweltering location is wherein the Sun"s power is created via a procedure known together thermonuclear fusion. While blend is challenging to mimic ~ above Earth, the main point of the Sun and other stars is a perfect atmosphere for it. Here, the temperatures are high enough for hydrogen nuclei come smash with each other and kind helium nuclei, publication tremendous quantities of energy in various forms. Energy developed in the form of light keeps bouncing approximately inside the Sun, as though the sun were made totally of mirrors. A bit of light can take much more than 30,000 years to with the surface and escape! power in the type of tiny particles referred to as neutrinos, however, deserve to travel straight out that the Sun and into the Solar System. Neutrino observatories on earth measure the regular wash of these tiny, fast-moving particles. The evident visual size of the sunlight is -26.8, making that appear about 10 billion (10,000,000,000) times as bright together the next brightest star, Sirius. The pure magnitude that the Sun, the magnitude it would have at a street of 10 parsec or 32.6 light years, is +4.8. Amongst the brightest stars we deserve to see v the naked eye, there is just one, alpha Centauri, through a similar absolute magnitude to the Sun. Most of the rest are intrinsically far brighter. irradiate takes around 500 secs (8 1/3 minutes) to take trip from the sunlight to the Earth. The mean distance come the earth from the facility of the sun is about 149,000,000 km, or 93,000,000 miles; a distance well-known as an astronomical unit (AU). There space over 63,000 AU in 1 irradiate year. 1 AU is about 0.000016 irradiate year. The nearest star, alpha Centauri, is 4.3 light years distant, or about 280,000 AU.


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task on the solar surface, picture by Brad Snowder.