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A star must be at least 25 times the mass of the sun to form a black hole, though only a fraction of that mass is incorporated into the black hole.
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How far from a black hole's event horizon would you have to be to experience the equivalent of Earth's gravity?
That would depend on the mass of the black hole. Here are some values: 3 solar masses: 3.96 million miles 30 solar masses: 12.5 million miles 1000 solar masses: 72.3 million miles 1 million solar masses: 2.23 billion miles 4 million solar masses: 4.57 billion miles 100 million solar masses: 22.7 billion miles 1 billion solar masses: Within the event horizon
What is a stelar black hole?
That refers to a black hole that results from the gravitational collapse of a star, and which has a mass between 3 solar masses and several solar masses, depending on the mass of the star that collapsed.
What is a supermassave black hole?
A supermassive black hole refers to a black hole of considerable mass - usually between around a million solar masses, and several billion solar masses. Such huge black holes are found in the center of all large galaxies.
What forms from a supernova?
Depending on the mass of the original star it will either end up as a neutron star (< 20 solar masses) or a black hole (> 20 solar masses).
What is the mass range for a supermassive black hole?
Anywhere from about 100,000 solar masses (100,000 times the mass of our Sun), to more than 10 billion solar masses (the approximate size of the largest known black holes).
Are black holes bigger than the whole solar system?
If you mean the event horizon, it is very possible but none have been discovered. The largest black hole's (At 40 billion solar masses (1 = Sun mass)) event horizon is about 789 au which if it were the Sun, would reach beyond the mean distance from the Sun to Sedna. For reference, the solar system is about 1,921.56au if you measure to the heliopause. The size required to be large than the solar system would be, if my math is correct, over about 97.3 billion solar masses.
How big is the event horizon of a 100-solar-mass black hole?
A black hole of 100 solar masses would have an event horizon 185.3 miles in radius.
How big is the black hole in Andromeda?
The black hole at the centre of the Andromeda galaxy is estimated to be 140 million Solar-masses.
What is the significance of 3 solar masses in a star's fate?
After a high-mass star explodes as supernova and leaves a core behind, the core would become a neutron star or a black hole. If the core is less than 3 solar masses, it would become a neutron star; if the mass exceeds 3 solar masses, the core would continue to collapse, forming a black hole.
What is the weight of a supermassive black hole?
For a black hole to fall into the supermassive category, it usually would need to have the equivalent of hundreds of thousands up to millions of solar masses. The supermassive black hole at the nucleus of our Milky Way galaxy is calculated to be over 4 million solar masses. The heaviest known black hole, which is still the subject of study, may be as heavy as 40 billion solar masses. (The Sun weighs about 2 x 10^30 kg).
How may sun's will it take to make 1 black hole?
A black hole needs to be a minimum of about 3 or 4 solar masses.
What would be the Schwarzschild radii of black holes of 1 billion solar masses?
The Schwarzschild radius is directly proportional to the mass of the black hole. It is about 2.95 km for every solar mass.
