How big would the Earth have to be to behave like a black hole?

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.

How small can a stable black hole be?

There’s no minimum size. There’s a minimum density. Stars turn themselves into black holes when they exhaust their fuel and collapse. For that to yield a black hole, they need to start off with around 25 solar masses.

What is the smallest diameter of a black hole?

NASAscientists have identified the smallest, lightest black hole yet found. The newlightweight record-holder weighs in at about 3.8 times the mass of our sun andis only 15 miles (24 kilometers) in diameter.

What is the smallest possible size for a black hole?

The smallest possible astrophysical black holes are defined by the Tolman–Oppenheimer–Volkoff limit, which defines the maximum mass of a neutron star, which is 1.5–3 M☉. So this is also the lower bound for a black hole; any star with an end mass above this limit—corresponding to an initial mass of 15–20 M☉—will collapse into a black hole.

What happens if you go too close to a black hole?

Smaller black holes like the one in J1650 exert stronger tidal forces than the much larger black holes found in the centers of galaxies, which make the little guys more dangerous to approach. “If you ventured too close to J1650’s black hole, its gravity would tidally stretch your body into a strand of spaghetti,” says Shaposhnikov.

What is the minimum radius of a stellar mass black hole?

So this is also the lower bound for a black hole; any star with an end mass above this limit—corresponding to an initial mass of 15–20 M☉—will collapse into a black hole. So the minimum radius of a stellar-mass black hole would be 4.43–8.86 km (2.75–5.51 mi).

Where is J1650-500 black hole located?

The tiny black hole resides in a Milky Way Galaxy binary system known as XTE J1650-500, named for its sky coordinates in the southern constellation Ara. NASA’s Rossi X-ray Timing Explorer (RXTE) satellite discovered the system in 2001.

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