protostar 中文意思是什麼
protostar
解釋
原恆星-
Most of the energy generated in the protostar stage comes from the gravitational energy of the cloud, just like a ball will drop with increasing speed from your hand if you release it
在原恆星階段，星體的能量主要來自星際雲引力塌縮時所釋放的位能，猶如樹上的蘋果會向下掉一樣。 -
The conditions in a protostar resemble far more closely in situation in red giants, most of whose volume is caught up in stormy convection.
原恆星的條件更加類似於紅巨星的情形，紅巨星體積的大部分都捲入劇烈的對流中。 -
The embryo inside the protostar is less massive than the envelope; most of the mass is still falling inward.
原恆星內部的胚胎的質量比包殼小，大部分物質一直在朝中心落去。 -
If the protostar is slightly more massive than a planet, but not massive enough to burn its nuclear fuels, it becomes a
如果一顆原恆星的質量只是比行星大少許，它的中心便不能產生熱聚變，成為一顆昏暗而難以被發現的 -
Which is very dim and hence very difficult to find. if it is massive enough though model dependent, the lower mass limit is about 0. 1 solar mass, the gas in the protostar continues to heat up until the central portion becomes hot and dense enough for, say, the hydrogen nuclei to overcome their mutual electrical repulsion. nuclear fusion will then take place and a star is finally born
如果原行星質量足夠大下限約為0 . 1個太陽質量，要注意的是，不同的理論模型會給出不同的下限，原恆星會不斷變熱，直至核心部分足夠熱和高壓，令氫原子核克服質子間的電排斥力，產生核聚變，成為一顆真正的恆星。 -
The luminosity per surface area will increase because the temperature increases. but if a star is not very massive, its luminosity will drop because the size of the star protostar decreases much faster
每單位面積的光度會隨著恆星的溫度增加而上升，但假若恆星原恆星質量不足，它的光度會由於星體體積下降過速而不升反減。 -
Models of protostar also show that they will have
原恆星的理論模型顯示它們會有 -
Thus, the infant science of protostar observation has a variety of tools at its disposal.
這樣一來，觀測原恆星這門年輕的科學，就擁有許多種可以利用的工具了。 -
Since there is no nuclear reaction inside the protostar, a protostar is not a star yet
由於在原恆星的核心尚未發生核聚變，它們仍不能稱為真正的恆星。
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