What lies on the other side of a Black-hole
A black hole is a region of space within which the force of gravity is so strong that nothing, not even light, can escape.
The existence of such objects was first suggested as far back as the late 1700s. However, it was Karl Schwarzschild (1873-1916), a German astronomer, who basically developed the modern idea for a black hole. Using Einstein’s theory of general relativity, Schwarzschild discovered that matter compressed to a point (now known as a singularity) would be enclosed by a spherical region of space from which nothing could escape. The limit of this region is called the event horizon, a name which signifies that it is impossible to observe any event taking place inside it (since information is unable to get out).
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| A black hole holds some of the major mysteries of the universe |
For a non-rotating black hole, the radius of the event horizon is known as the Schwarzschild radius and marks the point at which the escape velocity from the black hole equals the speed of light. In theory, any mass can be compressed sufficiently to form a black hole. The only requirement is that its physical size is less than the Schwarzschild radius. For example, our Sun would become a black hole if its mass was contained within a sphere about 2.5 km across.
Types of Blackhole
- Primordial Black Holes have masses comparable to or less than that of the Earth. These purely hypothetical objects could have been formed through the gravitational collapse of regions of high density at the time of the Big Bang.
- Stellar Mass Black Holes have masses between about 4 and 15 solar masses and result from the core-collapse of a massive star at the end of its life.
- Intermediate Mass Black Holes of perhaps a few thousand solar masses may also exist. Sketchy evidence suggests that they may be found in some clusters of stars, and may eventually grow into supermassive black holes.
- Supermassive Black Holes weigh between 106 and 109 solar masses and are found at the centers of most large galaxies.
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| There many types of galaxies |
Alternatively, black holes can be classified by their two other properties of rotation and charge:
- Schwarzschild Black Hole, otherwise known as a ‘static black hole’, does not rotate and has no electric charge. It is characterized solely by its mass.
- Kerr Black Hole is a more realistic scenario. This is a rotating black hole with no electrical charge.
- Charged Black Hole can be of two types. A charged non-rotating black hole is known as a Reissner-Nordstrom black hole, a charged, rotating black hole is called a Kerr-Newman black hole.
Formation of Blackhole
It's generally accepted that stars with a mass at least three times greater than that of our Sun's can undergo extreme gravitational collapse once their fuel depletes.
With so much mass in a confined volume, the collective force of gravity overcomes the rule that usually keeps the building blocks of atoms from occupying the same space. All this density creates a black hole.
The second type of miniature black hole has been hypothesized, though never observed. They're thought to have formed when the rippling vacuum of the early Universe rapidly expanded in an event known as inflation, causing highly dense regions to collapse.
Called primordial black holes, they'd have a smaller mass – some even close to that of Earth.
Could a Black Hole Destroy Earth?
Black holes do not go around in space eating stars, moons, and planets. Earth will not fall into a black hole because no black hole is close enough to the solar system for Earth to do that.
Even if a black hole the same mass as the sun were to take the place of the sun, Earth still would not fall in. The black hole would have the same gravity as the sun. Earth and the other planets would orbit the black hole as they orbit the sun now.
The sun will never turn into a black hole. The sun is not a big enough star to make a black hole.
That's it for now. Stay Safe. Stay Healthy.
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