What Is The Combined Percentage Of Hydrogen And Helium In The Sun's Makeup Of Gases? *

What is the dominicus made of?

(Image credit: NASA/SDO)

The dominicus is a big ball of gas and plasma, but what is the dominicus fabricated of exactly? Most of the gas — around 92% — is hydrogen, according to NASA (opens in new tab). It is converted into energy in the sun's core. The energy moves outward through the interior layers, into the sun'south atmosphere, and is released into the solar arrangement equally heat and calorie-free.

Nuclear fusion

In the lord's day'due south core, gravitational forces create tremendous pressure and temperatures. The temperature of the sun in this layer is about 27 million degrees Fahrenheit (fifteen meg degrees Celsius). Hydrogen atoms are compressed and fuse together, creating helium. This process is called nuclear fusion. As the gases heat up, atoms interruption apart into charged particles, turning the gas into plasma.

The free energy, mostly in the class of gamma-ray photons and neutrinos, is carried into the radiative zone. Photons can bounce around at random in this zone from somewhere between a few thousand to virtually a 1000000 years before traveling to the surface, according to Sten Odenwald on NASA's Inquire the Infinite Scientist (opens in new tab) folio.

Why don't we know how long it takes for a photon to travel outward from the eye of the dominicus? For one thing, scientists tin't see into the core to track a photon from its birth. Instead, they must rely on models that follow the infamous "drunkard's walk (opens in new tab)" problem.

According to this scenario, the distance a drunken person travels while making random left and right turns is their typical footstep size times the square root of the number of steps taken. For a randomly traveling photon in the solar heart, this depends on what is used for the mean complimentary path (or average distance travel) of radiation. These numbers range from 4,000 years to millions of years, though near solar scientists tend to rely on 170,000 years, co-ordinate to the book Welcome to the Universe: An Astrophysical Tour (opens in new tab).

Nuclear fusion — Four hydrogen nuclei combine to release a helium nucleus. (Paradigm credit: Getty Images)

"Photons go on a random walk within the sun," space scientist Lucie Light-green, a professor at the University of California, Los Angeles, told Infinite.com. "I would say 170,000 years for photon to escape."

"Nearly astronomers are not too interested in this number and forgo trying to pivot information technology down exactly because it does non impact any phenomena nosotros measure with the exception of the properties of the core region right now," Odenwald said (opens in new tab).

Scientists think the sun's magnetic field is generated by a magnetic dynamo in the radiative zone.

The convection zone (as well known equally the convective region) is the outermost layer of the sun's interior. It extends from about 125,000 miles (200,000 km) deep up to the visible surface or the sun's temper, co-ordinate to NASA (opens in new tab). The temperature drops below 3.v million degrees F (ii meg degrees C) in the convective zone, where hot plasma bubbles up toward the surface.

The sun's zones — This image shows the sun's three major zones (convective zone, radiative zone and core). (Paradigm credit: ESA&NASA/SOHO)

The convective motions carry heat quite rapidly to the surface, which is the bottom layer of the sun's atmosphere, or photosphere. This is the layer where the energy is released as sunlight. The light passes through the outer layers of the dominicus'southward atmosphere — the chromosphere and the corona.

Nosotros usually can't see these layers, but during a full solar eclipse, the chromosphere looks like a reddish rim around the sun, and the corona forms a white crown with plasma streamers spreading outward. The chromosphere gets its crimson colour from the abundance of hydrogen, according to the National Solar Observatory (opens in new tab).

Abundance of elements

Astronomers who have studied the composition of the sun have catalogued 67 chemical elements in the sun. There may exist more, but in amounts too small for instruments to detect. Here is a table of the 10 most common elements in the sun, according to NASA Goddard Infinite Flight Center (opens in new tab):

Element	Abundance (pct. of total number of atoms)	Abundance (pct. of total mass)
Hydrogen	91.2	71.0
Helium	8.vii	27.ane
Oxygen	0.078	0.97
Carbon	0.043	0.40
Nitrogen	0.0088	0.096
Silicon	0.0045	0.099
Magnesium	0.0038	0.076
Neon	0.0035	0.058
Fe	0.030	0.014
Sulfur	0.015	0.040

Boosted resource

For more information near the lord's day, read NASA Science's Solar System Exploration (opens in new tab) page. Additionally, you can find the answers to more questions about the sun at the Natural History Museum Great britain (opens in new tab) website.

Bibliography

"On the photon diffusion fourth dimension scale for the sun". Astrophysical Periodical, Part i (1992). https://adsabs.harvard.edu/full/1992ApJ...401..759M (opens in new tab)

"On the time calibration of free energy transport in the sun". Solar Physics (2003). https://www.researchgate.net/publication/226250698_On_the_time_scale_of_energy_transport_in_the_Sun (opens in new tab)

"The random walk of radiation from the sun". Walker, Fifty. 1000. (2006). https://www.researchgate.internet/publication/238080819_The_random_walk_of_radiation_from_the_sun (opens in new tab)

"Welcome to the universe: an astrophysical tour". Tyson, N. D., Strauss, K. A., & Gott, J. R. (2016). Princeton University Press. https://books.google.co.uk/books (opens in new tab)

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Tim Sharp is the Reference Editor for Space.com. He manages articles that explicate scientific concepts, describe natural phenomena and define technical terms. Previously, he was a Technology Editor at The New York Times and the Online Editor at the Des Moines Register. He was too a re-create editor at several newspapers. Before joining Purch, Tim was a developmental editor at the Hazelden Foundation. He has a journalism degree from the University of Kansas. Follow Tim on Google+ and @therealtimsharp

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