What is the ratio of hydrogen to helium in the sun?

What is the ratio of hydrogen to helium in the sun?

The Sun is a typical star, and is also the star that is nearest to the Earth. It is composed of a mixture of 73% hydrogen, 25% helium, and 2% other elements by weight.

How do heavier elements form during the star formation and evolution?

Elements heavier than Iron Elements heavier than iron cannot be formed through fusion as tremendous amounts of energy are needed for the reaction to occur. Heavy elements are formed in a supernova, a massive explosion of a star. Rather, a more massive isotope of the same element is produced.

What happens to the helium in the sun?

The internal core collapses, and heats up, until it is hot enough to fuse helium into larger atoms, for instance, by combining three helium atoms into carbon. At this same time, some helium will fuse with that carbon to produce oxygen.

What type of visible stars is the coolest?

The main categories of spectral type are M, K, G, F, A, B, and O. The coolest stars (red dwarfs) being M, and the hottest stars being O. Our own Sun is a G star. Red dwarfs are small stars in terms of their mass.

What color of stars are the coolest?

Red stars

What star has the coolest surface temperature?

Astronomers classify stars into different types depending on their temperatures. These types are O, B, A, F, G, K, and M, where type O stars are the hottest and type M stars are the coolest.

What star has the lowest surface temperature?


What is the hottest type of sun?

Eta Carinae could be as large as 180 times the radius of the Sun, and its surface temperature is 000 Kelvin. Just for comparison, 40,000 Kelvin is about 72,000 degrees F. So it’s the blue hypergiants, like Eta Carinae, which are probably the hottest stars in the Universe.

What is the coolest main sequence star?

Red dwarfs

Which stars last the longest?

Life Cycle of a Medium-Sized Star Generally, the bigger a star is, the faster it uses up its supply of nuclear fuel, so the longest-lived stars are among the smallest. The stars with the longest lifetimes are red dwarfs; some may be nearly as old as the universe itself.

Which star is the coldest?

In general, a star’s temperature determines its color, from red to blue-white. Spectral types are named with a letter. The seven main types are M, K, G, F, A, B and O. M stars are the coldest stars and O stars are the hottest.

What is biggest star in the universe?

Answer: The largest known star (in terms of mass and brightness) is called the Pistol Star. It is believed to be 100 times as massive as our Sun, and times as bright! In 1990, a star named the Pistol Star was known to lie at the center of the Pistol Nebula in the Milky Way Galaxy.

Which is biggest sun or star?

On a stellar scale, it’s really quite average — about half of the known stars are larger; half are smaller. The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun.

What is the color of the hottest star in the universe?


What color is the sun actually?


What temperature are humans most comfortable in?

around 70 degrees Fahrenheit