# What is G in Schwarzschild radius?

## What is G in Schwarzschild radius?

The Schwarzschild radius (Rg) of an object of mass M is given by the following formula, in which G is the universal gravitational constant and c is the speed of light: Rg = 2GM/c2.

What is Schwarzschild limit?

The Schwarzschild radius for the Earth is approximately one inch, meaning that you could squish the entire mass of the Earth into a sphere the size of a basketball and still not have a black hole: light emitted from that mass can still escape the intense gravitational pull.

### What is the Schwarzschild radius for a black hole?

Parameters

Observable universe 8.8×1052 kg 4.4×1026 m (46.5 billion ly)
Milky Way 1.6×1042 kg 5×1020 m (52.9 thousand ly)
TON 618 (largest known black hole) 1.3×1041 kg
SMBH in NGC 4889 4.2×1040 kg

What does the Schwarzschild radius measure?

The Schwarzschild radius (sometimes erroneously referred to as the gravitational radius), is the radius of a sphere that has certain properties: if all the mass of an object is compressed within this sphere, the escape speed from the surface of the sphere would equal the speed of light.

#### What is the value for g?

9.8 m/s2
Its value is 9.8 m/s2 on Earth. That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2.

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. Still, that much mass is impressively crammed into a spherical volume with a radius of less than 13 million miles (21 million kilometers) — half of Mercury’s orbit.

## What is diameter of black hole?

It has a diameter of about 78 billion miles. For perspective, that’s about 40% the size of our solar system, according to some estimates. And it’s estimated to be about 21 billion times the mass of our sun. So there you have it, black holes can be millions of times larger than suns and planets or as small as a city.

How many solar masses make a black hole?

(Our Sun is much too small, or insufficiently massive, to form a black hole when it finally runs out of fuel.) A typical stellar-class of black hole has a mass between about 3 and 10 solar masses. Supermassive black holes exist in the center of most galaxies, including our own Milky Way Galaxy.

### What is Big G and Little G?

G and g are two values that are frequently used while discussing gravitational force. Small g(g) is the acceleration due to gravity and big g(G) is the universal gravitational constant.

Who calculated value of G?

Lord Henry Cavendish
The value of G was not experimentally determined until nearly a century later (1798) by Lord Henry Cavendish using a torsion balance.

#### Is Sagittarius A growing?

The supermassive black hole at the core of the Milky Way Galaxy appears far less greedy, growing at a rate of one solar mass every 3,000 years, researchers said. Scientists estimate that this black hole, also known as Sagittarius A* (pronounced “Sagittarius A-star”), has the mass of about 4 million suns.

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