How does a star get 'larger'
[From: ] [author: ] [Date: 11-09-24] [Hit: ]
and the balance of temperature, pressure, and gravity.to oversimplyfy, it gets larger because hydrogen fusion is what keeps it so dense........
A black hole doesn't "suck in" anything, not light or anything else. Its not like a vacuum cleaner.
A black hole has so much gravity around it that anything that gets too close can't escape.
-
it's a lengthy explaination involving the end of a stars main sequence life (when it switches from hydrogen fusion to helium fusion), the contraction of the core, and the balance of temperature, pressure, and gravity. to oversimplyfy, it gets larger because hydrogen fusion is what keeps it so dense... when that process comes to an end, and the star starts fusing helium, the equilibrium between temperature and pressure changes... this is also why red giants have lower surface temps than the same stars when they were on the main sequence
-
A star can change shape (get bigger) but not lose or gain mass. The balance between gravity and heat production keeps a star the same size. If heat production goes up as the star ages, it swells into a red giant star. That is what will happen to our sun in a billion years or more.
If a star is one of a binary pair that are very close, one could suck gases off the other star, gaining mass. But the increased mass unbalances the star, and it will collapse, getting smaller.
A star can become so unbalanced that it will explode, and be a nova or supernova. The outer layers of the star will blast out, forming a gas shell that grows very large over time.
-
As a star's hydrogen is converted to helium, when the percentage of hydrogen drops to about 30% (the exact amount depends on many factors) the core begins to heat up. A hotter core expands, forcing the overlying layers also to expand. The outermost layer may have some of its material ejected into space, but generally this is a small percentage of the mass.
Note that the Sun right now is losing a small amount of mass through the solar wind and coronal mass ejections.
-
Stars get larger by producing more heat and expanding.
Black hole move faster than light? In what frame of reference?
Time slows as you approach a 'hole', and is is discontinuous at the event horizon,
so external events measure from that location could give anomalous 'velocity' readings.
-
Black hole moving faster than light? What have you been smoking?
