Holes

Hello everybody!

This week I`ll let you know what the holes of cosmos that black hole, worm hole and white hole are.

 

Black hole is a star which is too massive to hold its own size. Fixed stars finally become those 3 forms that is white dwarf, neutron star and black hole rely on its mass. In this article, the base of mass unit is the mass of the sun.

In cases that mass of a fixed star is over 8 times of sun`s, the star cannot but collapsing because of too heavy gravity what is called “Gravitational collapse”. That mass is over 10 times of sun`s, the star finally become a neutron star. The manufacturing process of neutron star is similar to that of black hole. Its heavy mass make a proton capture an electron, then they erase their electric power each other, assimilate and become a neutron. This is an awful incident because something can shape in this size through the size of atoms which most depend on the distance between proton and electron. But without it, the size of atom had changed to a neutron become about 10,000 times smaller at least.  For an easy example, like the Tokyo dome is miniaturized to ping- pong ball. For such a reason,  a too heavy star at last shrink dramatically( then the star give off gigantic energy what is called super nova) and become a neutron star or a black hole if that mass is over 30 times of sun`s.

What image do you have for black hole? Maybe a hole which swallow everything around. It`s not exactly because we cannot observe it for reason that light cannot reflect a black hole. But black hole is said to certainly exist and vary, observing such as the motion of around stars. At first, the existence predicted by “general theory of relativity” as a singular point. Black hole is thought to be in event horizon, which is a horizon we can get information then the inside is unknown. Why then, do you know escape velocity? It`s a function of distance and mass, and with so heavy mass it reach the velocity of light. We keep being hold by the source of mass if we cannot reach an escape velocity. So event horizon can be said the range where escape velocity is over the speed of light. In general theory of relativity, light is the fastest in this universe then once enter an event horizon we could never return to the out.

If we close to a black hole, we do not immediately close to event horizon but infinitely take times. Refer to the general theory of relativity again, the speed of passing time would be slower proportionate to the increase of mass. Therefore if I reach an event horizon, you from a distance  will see me as if I stopped there forever in spite of I feel time goes as usual.

Wormhole is the tunnel connects a black hole to a white hole. This and white hole is a only imagination yet now. For black hole have swallowed something, returning the passed time it throw up everything. This hole is a white hole. Where we get to thorough the tunnel is maybe other cosmos or past our cosmos or other dimension we cannot see now.

Cosmos is full of interest and idea, so I love cosmos. Why don`t you?  Then, see you next week!