Cooking elements With stars more massive than ours, and up to about eight times its mass*, gravity is forcible enough to compress the core sufficiently to trigger nuclear reactions that produce heavier elements, starting with carbon (element 6) and oxygen (8).
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On another note, what are stars mostly made of quizlet?
Stars are mostly made of hydrogen and helium.
ο»Ώis it true, why is space dark? Because space is a near-perfect vacuum β meaning it has exceedingly few particles β there's virtually nothing in the space between stars and planets to scatter light to our eyes. And with no light reaching the eyes, they see black.
Same, what keeps them shining so bright?
Stars shine because they are extremely hot (which is why fire gives off light β because it is hot). The source of their energy is nuclear reactions going on deep inside the stars.
What kind of star is our Sun quizlet?
The Sun is a type G2 star. It has a surface temperature of just under 6000 K. Its absolute magnitude is about a +5.
7 Related Questions Answered
The vast majority of stars are main sequence stars - these are star like the Sun that are burning hydrogen into helium to produce their energy. Most stars spend 90% of their life as main sequence stars. When stars exhaust their hydrogen fuel the outer layers of the star can expand greatly and the star becomes a giant.
Stars are mainly made of hydrogen and helium gas. In the centre of a star, the temperature and pressure are so high that four protons can fuse to form helium, in a series of steps. This process releases huge amounts of energy and makes the stars shine brightly.
The sun is a big ball of gas and plasma. Most of the gas β 92% β is hydrogen.
Eventually, as stars age, they evolve away from the main sequence to become red giants or supergiants. The core of a red giant is contracting, but the outer layers are expanding as a result of hydrogen fusion in a shell outside the core. The star gets larger, redder, and more luminous as it expands and cools.
And, just like a golf ball, the Sun is made up of layers: a core, a surface, and surrounding atmospheric layers, each of which have their own layers. Core: the temperature at the very center of the Sun is about 27 million degrees Farenheit (F).
O stars are the hottest, with temperatures from about 20,000K up to more than 100,000K. These stars have few absorption lines, generally due to helium. These stars burn out in a few million years. B stars have temperatures between about 10,000 and 20,000K.
The reason is obvious: sunlight contains energy, and in near-Earth space, there is no atmosphere to filter that energy, so it's even more intense than it is down here. Now, on Earth, if you put something out in the sun, it warms up.