Stars with the masses less than or equivalent to our Sun will end up as White dwarfs after it uses all the fuel in it. This means, it no longer experiences an outward push from the process of fusion resulting as it collapses inward on itself. It is indeed a lifeless stellar object. White dwarfs are considered to be the one among the densest objects in space, because they have mass approximately to our Sun, but have roughly the radius of Earth.
According to Pauli’s exclusion principle, no two electrons can occupy the same energy level. In a normal gas, electrons might not face any problem in occupying the energy levels. Because they are free to float around (i., e) there will be enough space for the electrons to settle down in each energy level. Since white dwarfs are dense, all the electrons are much closer together. This is referred to as “Degenerate” state or gas. Meaning that all the electrons are filled up in its energy levels. Once a star is degenerate, gravity cannot compress it anymore, because quantum mechanics dictates that there are no empty energy levels to take up another electron. So, the white dwarf survives, not by an internal fusion but by quantum mechanical principle that prevents it from collapsing.
What happens to the White Dwarf then?
There are quite a lot of possibilities that a White dwarf stays in the picture and does not fade away. One possibility is that white dwarf eventually stops emitting light and heat and becomes black dwarfs.
Another possibility is that if the white dwarf is part of a binary system (the two stars rotating each other at a very high velocity) with an active star, it may be able to suck up the material from its companion star and due to which its temperature increases and that results in a violent supernova, destroying the white dwarf. This process is known as ‘Single-degenerate model’.
If the companion is another white dwarf instead of an active one, the two stellar corpses merge together creating an explosion known as Type Ia supernova. They are rich in isotopes that generate positron from its supernova. This process is known as the ‘Double-degenerate model’ of Type Ia supernova. In a matter of seconds, all the white dwarf’s mass is thrown into space.
In other cases, in a binary system, white dwarf just pulls enough material and energy in order to get a little far from exploding and remains alive.
With surface gravity 100,000 times that of Earth, the atmosphere of white dwarfs behaves very strangely. The lighter elements remain at the surface and the heavier atoms in its atmosphere sink. Some white dwarfs even have the lightest form of elements (almost pure hydrogen or helium). Also, gravity pulls the atmosphere close around it in a very thin layer.
References
https://imagine.gsfc.nasa.gov/science/objects/dwarfs2.html
StarDustWaves 
What if the Earth’s gravity becomes 100,000?!!
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To answer in just two words, “We die!”. Humans can’t even hold much longer when gravity becomes 5% greater than now. So, for your estimated gravity which is 100,000 we will just crumble into pieces and our Earth’s core collapses!
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