The recent observations ofsolar 5-min oscillations of low degree agree approximately with the predictions of a standard solar model with normal abundances of helium and heavy elements. Much of the apparent discrepancy noticed when the observations werefirst announced was a result of having neglected ...
由于Helios是“太阳神”,所以helio意思为太阳,由于太阳能发光,所以helio-也表“发光”的意思。 helium氦:该元素的存在首先是在太阳光谱(spectrum)中测得,所以该元素的表达就取了太阳的前部分(heli-)与光谱(spectrum)的后部分,形成词汇helium(-ium本身就表示化...
The origin of helium, however, remains a major problem. Indeed, Hoyle and Tayler 1 concluded that the chief fraction of the helium in the Galaxy was synthesized not in stellar interiors but either in the primordial fireball or in a massive object which preceded the formation of the stars. ...
The meaning of SUN is the luminous celestial body around which the earth and other planets revolve, from which they receive heat and light, which is composed mainly of hydrogen and helium, and which has a mean distance from earth of about 93,000,000 mile
(4He). The net result is that four hydrogen atoms are fused into one helium atom. The energy is carried off by gamma-rayphotons(γ) and neutrinos, ν. Because the nuclei must have enough energy to overcome the electrostatic barrier, the rate of energy production varies as the fourth power...
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In the cloud of molecular hydrogen in the heart of the nebula original, over the millennia, the nuclei of hydrogen compressed by gravity are transformed into helium, nuclear fusion starts, the gas ignites, the Sun was born in the darkness. This is how our Sun 1,392,000 km in diameter, ...
The Sun is a star at the center of oursolar system. In its core, it converts hydrogen into helium. This is done in a series ofnuclear fusionreactions that produce large amounts of energy. This energy reaches Earth in the form ofsolar radiation(sunlight). ...
It’s just a big ball of gas.And we measure it… it’s made mostly of hydrogen. So it’s roughly 90% hydrogen, it’s maybe 8% helium, and the rest of it’s made up of things like iron, carbon, oxygen, nickel. 太阳就是一个充斥着气体的巨大球...
At some point when the sun reaches the tip of the AGB [the asymptotic giant branch], helium burning will commence. In a star like the sun, helium burning occurs by thermal pulses. In each pulse, the sun will undergo significant mass loss. However, the sun has been undergoing mass loss ...