What is the radius of the event horizon of that black hole?
30 kilometers
This boundary is called the event horizon. The radius of the event horizon (proportional to the mass) is very small, only 30 kilometers for a non-spinning black hole with the mass of 10 Suns.
What is the event horizon of a black hole and how is it related to the Schwarzschild radius?
Surrounding the black hole is something called the event horizon, the boundary between the black hole and the rest of the universe where the escape velocity is just equal to the speed of light. The Schwarzschild radius depends only on the mass of the object that creates the black hole.
How big would the Earth be as a black hole?
The Earth’s Schwarzschild radius is thought to be around 8.7mm, or roughly 17.5mm in diameter. A U.S. cent is around 19mm in diameter, so if someone were to shrink the Earth down to a little less than the size of a U.S. cent, it would become a black hole.
How heavy is Sagittarius A?
4 million solar masses
Sagittarius A* weighs 4 million solar masses, which is less heavy than what lurks within the cores of most galaxies.
How small is a black hole singularity?
The discreteness of space-time prevents matter from reaching anything smaller than the Planck length (around 1.68 times 10^-35 meters, so… small). All the material that has ever fallen into the black hole gets compressed into a ball not much bigger than this. Perfectly microscopic, but definitely not infinitely tiny.
How massive is Sagittarius A *?
4.1 million M
Sagittarius A
| Astrometry | |
|---|---|
| Mass | ~4.1 million M ☉ |
| Radius | 31.6 R ☉ |
| Age | +10.000 years |
| Other designations |
How big is the event horizon of a black hole?
The size of an event horizon depends on the black hole’s mass. If Earth were compressed until it became a black hole, it would have a diameter of about 0.69 inches (17.4 millimeters), a little smaller than a dime; if the sun were converted to a black hole, it would be about 3.62 miles (5.84 kilometers) wide, about the size of a village or town.
What happens when an object falls into a black hole?
From the viewpoint of a distant observer an object falling into a black hole appears to slow down and fade, approaching but never quite reaching the event horizon. Finally, at a point just before it reaches the event horizon, it becomes so dim that it can no longer be seen (all due to the time dilation effect).
How big is the black hole at the center of the Galaxy?
The black hole at the center of the Milky Way, for example, is estimated to have a mass equal to about 2,500,000 suns and have an event horizon many millions of kilometers across.
What is a black hole region?
The black hole region, B, of such a spacetime is defined to be the points of M not contained in the causal past of future null infinity. The boundary of B in M is called the event horizon.