2006-09-22 05:18:14 · 14 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Earth can never be a black hole. It is a planet and has no energy source of its own. This term is applicable to a star. A star only can become a black hole under certain conditions.
2006-09-22 05:47:17 · answer #1 · answered by openpsychy 6 · 2⤊ 0⤋
The diameter of a black hole depends on the mass of the original object that becomes a black hole. By the way, before they were called black holes, they were called gravitationally completely collapsed objects. (Try saying that fast 3 times!)
The more massive an object, the bigger its diameter once it becomes a black hole. If the Earth became a black hole it would have a diameter of about 0.017 meters, about the size of a marble. Our Sun would have a diameter of about 6000 meters, just a little less than 4 miles.
No one really knows what would happen if you were to get sucked into a black hole. In fact, if our current theories of black holes are correct, no one outside a black hole can know. The issue is that as you pass the edge of the black hole, called the event horizon, you lose the ability to communicate with the outside universe. No information from inside a black hole has ever been detected by our scientists.
The most common understanding of what would happen if you were to enter a black hole is that you would be stretched like a string of spaghetti until you snapped! This would happen because as you approached the center of the black hole the gravitational force on your feet would be much, much greater that that on your head, gradually pulling you apart.
2006-09-22 12:21:01 · answer #2 · answered by Anonymous · 2⤊ 0⤋
my dear, the earth will not become a black hole. That adversity is only faced by stars having huge masses. As for the earth having a diameter of 12756 km it will either end up drowned by global warming, or if nature had its own way, it would stay as it is for humans to advance (if they understand nature that is)
2006-09-23 00:51:22 · answer #3 · answered by vishal_willpower 2 · 0⤊ 0⤋
Hey guys we are missing the point here. This is a hypothetical question. Of course we don't have enough mass to collapse under our own weight but if it could happen the diameter would be small really really small, probably less that the diameter of a pin.
Close enough?
2006-09-22 13:36:49 · answer #4 · answered by Manny L 3 · 0⤊ 0⤋
All objects have a radius associated with them called the Schwarzschild radius. This radius is proportional to the mass of the object. This value can be calculated by r = (Gm)/(c^2), where "r" is the Schwarzschild radius, "G" is the gravitational constant, "m" is the mass of the object, and "c" is the speed of light.
Any object smaller than its Schwarzschild radius is a black hole. For the Earth, it would need to be compressed to about 9 millimeters in radius, or about the size of a small jawbreaker.
2006-09-22 16:32:14 · answer #5 · answered by Joseph Q 2 · 2⤊ 0⤋
a black hole is a region of space time which is so warped that not even light can escape. therefore we could only measure the diameter of the event horizon.
2006-09-23 10:47:02 · answer #6 · answered by Anonymous · 1⤊ 0⤋
Very very small......bcoz the density of earth is much less than that of black hole
2006-09-22 14:01:17 · answer #7 · answered by hotshot 2 · 0⤊ 0⤋
6 cm
2006-09-22 12:27:11 · answer #8 · answered by r_wadhwa 3 · 0⤊ 0⤋
18 millimeter.
2006-09-23 02:24:45 · answer #9 · answered by Mohammed F 1 · 0⤊ 0⤋
as earth is non-luminious so,it can never be a blackhole
2006-09-24 09:01:43 · answer #10 · answered by bhavesh 1 · 0⤊ 0⤋