NORMAL black hole. If the core contains

NORMAL SIZED STARStars main source of fuel is hydrogen. When stars fuse hydrogen into helium, they burn which results in heat and light being emitted. However in the case where the star runs out of its fuel source, the star begins to contract and as this happens the core becomes hotter. This causes the upper layers of the star to expand resulting in it becoming a red giant. When the core becomes hot enough, the helium fuses into carbon. When all the helium is used up, the core expands and starts to cool down.

This cooling process continues until it becomes a white dwarf, then a black dwarf. No black dwarfs have been observed yet because a white dwarf takes longer than the current age of the universe to fade away. MASSIVE STARIf a really huge star dies, it has so much mass that after the helium is used up, it still has enough carbon to fuse it into heavy elements like iron.

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When the core turns to iron, it no longer burns. The star’s gravity causes it to collapse, and then it explodes into a supernova. What’s left of the core can form a neutron star or a black hole.

 If the core contains between 1.44 and 3 solar masses, that mass will crush into a volume just 10 to 15 miles wide before a quantum mechanical effect known as “neutron degeneracy pressure’ prevents total collapse. Question: How long does it take for the star to completely die?Answer: A star’s life expectancy depends on its mass. Generally, the more massive the star, the faster it burns up its fuel supply, and the shorter its life. The most massive stars can burn out and explode in a supernova after only a few million years of fusion. A star with a mass like the Sun, can continue fusing hydrogen for about 10 billion years. And if the star is very small, with a mass only a tenth that of the Sun, it can keep fusing hydrogen for up to a trillion years, longer than the current age of the universe.

Question: What would the difference be (if any) in the events that would occur of the death of a low-mass star and high-mass star?Answer: The answer to this would be the same as the first question with low mass stars being ‘average size stars’ and high mass stars as ‘massive stars’.  Question: When a star dies, high-speed gas can be ejected into the surrounding space. These gases can create a bubble of hot, ionized gas.

What are the features and characteristics of these bubbles? How do they influence its surrounding space? Answer: This is the best information I was able to find.A supernova explosion blows away the star’s outer layers, leaving a remnant such as the Crab Nebula (photo at bottom). The core is compressed into a neutron star, which sometimes manifests itself as a pulsar or X-ray burster. In the case of the largest stars, the remnant is a black hole greater than 4 M (solar masses). In a neutron star the matter is in a state known as neutron degenerate matter, with a more exotic form of degenerate matter, QCD Matter, possibly present in the core. Within a black hole, the matter is in a state that is not currently understood.

The blown-off outer layers of dying stars include heavy elements, which may be recycled during the formation of new stars. These heavy elements allow the formation of rocky planets. The outflow from supernovae and the stellar wind of large stars play an important part in shaping the interstellar mediumIn a system with binary stars, the breach of the Roche lobe (the region around a star where material is gravitationally bound to that star) when it is a Red Giant, may result in the transfer of material from the dying star to the remaining star if they are sufficiently close.


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