http://www.qrg.northwestern.edu/projects/vss/docs/space-environment/2-what-are-stars-made-of.html

Basically, stars are big exploding balls of gas, mostly hydrogen and helium. Our nearest star, the Sun, is so hot that the huge amount of hydrogen is undergoing ...

http://coolcosmos.ipac.caltech.edu/ask/205-What-are-stars-made-of-

Stars are made of very hot gas. This gas is mostly hydrogen and helium, which are the two lightest elements. Stars shine by burning hydrogen into helium in their ...

https://www.spaceanswers.com/deep-space/how-much-hydrogen-does-a-star-have/

Nov 7, 2018 ... We find out what that magic amount is to keep a star alive.

https://en.wikipedia.org/wiki/Star

A star is an astronomical object consisting of a luminous spheroid of plasma held together by its ..... Stars spend about 90% of their existence fusing hydrogen into helium in high-temperature and high-pressure reactions near the core. Such stars ...

https://www.scienceabc.com/nature/universe/where-do-stars-get-their-hydrogen-from.html

When we look up at the stars in the night sky, you are seeing the visible radiation from stars that billions or trillions of miles away. Similarly, when you bask in the ...

https://en.wikipedia.org/wiki/Stellar_nucleosynthesis

Stellar nucleosynthesis is the theory explaining the creation (nucleosynthesis) of chemical .... The type of hydrogen fusion process that dominates in a star is determined by the temperature dependency differences between the two reactions.

https://www.universetoday.com/24796/what-are-stars-made-of/

Feb 6, 2009 ... You might not be surprised to know that stars are made of the same stuff as the rest of the Universe: 73% hydrogen, 25% helium, and the last ...

http://butane.chem.uiuc.edu/pshapley/GenChem1/L1/3.html

Fusion in Stars. Swirls of hydrogen and helium gas condensed into huge clouds. The gravitational force at the core brought the matter closer and closer together ...

https://www.space.com/22437-main-sequence-stars.html

Feb 24, 2018 ... Main sequence stars are stars that are fusing hydrogen atoms to form helium atoms in their cores. Most of the stars in the universe are main ...

https://science.howstuffworks.com/star5.htm

As we mentioned before, stars are large balls of gases. New stars form from large , cold (10 degrees Kelvin) clouds of dust and gas (mostly hydrogen) that lie ...