when earth will entirely colapsed in the mouth of black hole
Answers
Answer:
earth will entirely collapse when you will die
Explanation:
Black Holes: The Life Cycle of a Star.
WRITE BY SHREYASH.......
It's not science fiction! Grolier’s The New Book of Knowledge details how stars cause this infamous phenomenom.
Grades
3–5, 6–8, 9–12
"Abandon all hope, ye who enter here," would be an appropriate warning for any space traveler foolish enough to approach a black hole. Black holes are proposed by astrophysicists as regions of space where gravity is so strong that the black holes act like stellar vacuum cleaners, sucking in matter and energy from space and allowing nothing, not even light, to escape.
The American physicist John Wheeler coined the term "black hole" in 1969, but, in fact, the theory has been around for much longer. As far back as 1783, English astronomer John Michell suggested that if a star were massive enough, it would have such a strong gravitational field that any light leaving the star would immediately be dragged back to the star's surface.
Michell's theories were largely ignored until 1939, when physicists Robert Oppenheimer and Hartland S. Snyder demonstrated that, based upon Albert Einstein's general theory of relativity, it would be possible for a star to collapse to the point where it would become a black hole.
Black Hole
This artist's concept of frame dragging in a black hole shows the curvature of space-time. No, it's not science fiction! Frame dragging is where the fabric of space (not just matter) is literally shifted by the gravitational pull of a black hole. A black hole is a region defined as the ultimate expression of gravity. (NASA)
How a Star Ages
In order to understand how a star could collapse into a black hole, it is first important to understand the life cycle of a star. A star is, essentially, a giant fusion reactor. At the central core of the star, swirling atoms of hydrogen gas collide with one another and merge to form helium. In the process of fusing together, these hydrogen atoms release a tremendous amount of energy in the form of heat.
At the same time, the star as a whole is continuously struggling against the inward pull of gravity. The inward gravity is from the central core of the star, which is surrounded by a massive envelope of gas. This inward pull is so immense that the star is always on the verge of collapsing under its own weight.
This is often illustrated with what is known as the "twin paradox." Imagine that you have twin brothers, named Bill and Ted, each 20 years old. Bill takes off in a spaceship, while Ted stays back on Earth. Bill's destination is a star 25 light-years away. (A light-year is the distance that a beam of light can travel in one year.) His spaceship can attain a speed of 99.9 percent of the speed of light. From Ted's point of view, Bill will be gone for 50 years (25 years to reach the star, plus 25 years to return). However, from Bill's point of view on board the spaceship, the entire trip will last only one year. This effect is known as "time dilation." When Bill returns to Earth, he will be only 21 years old, but his brother Ted will be a 70-year-old man.
Now, instead of two brothers, imagine that we are dealing with two mouths of a wormhole. Our advanced civilization could move one end of the wormhole, perhaps by using a heavy asteroid or a neutron star as a kind of gravitational tugboat. If the mouth of the wormhole were accelerated to a high enough speed and then returned to its original position, it would behave just like our space-traveling twin brother. A clock fixed to the moving mouth would tick more slowly than one at the stationary mouth.
For instance, the clock outside the accelerated mouth might read 12:00 noon, but the clock outside the stationary mouth would read 1:00 p.m. By passing from one mouth to the other, a space traveler could move back and forth through time.
How far could our traveler move through time? That would depend upon how long and how fast the wormhole mouth is accelerated. If the mouth were moved at 99.9 percent of the speed of light for 10 years, the time difference between the two mouths would be nine years and 10 months. Theoretically, if you accelerated a wormhole mouth fast enough and long enough, the time difference between the two mouths could be stretched across several centuries.
There is, however, a limitation to Kip Thorne's time machine. Common sense tells us you cannot travel back to a time before you created the wormhole and accelerated one of the mouths through space. After all, what we're doing is exploiting the relative rate at which time passes under the effects of speed. So, unfortunately, you could not pop back through time to visit the dinosaurs. Unless, of course, you were lucky enough to find a time hole that had already been constructed by an advanced civilization several million years ago.