What is the black hole condition?

A black hole is a region of spacetime where gravity is so strong that nothing — no particles or even electromagnetic radiation such as light — can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.

What is the black hole condition?

A black hole is a region of spacetime where gravity is so strong that nothing — no particles or even electromagnetic radiation such as light — can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.

What is the relationship between a galaxy’s mass and the mass of its central black hole?

The supermassive black holes — black holes of millions to tens of billions of solar masses — that lurk at the active centers of galaxies have a peculiar quirk: their masses correlate with the stellar masses of their hosts. This means that the larger a galaxy is, the larger we can expect its central black hole to be.

Does time exist in a black hole?

The singularity at the center of a black hole is the ultimate no man’s land: a place where matter is compressed down to an infinitely tiny point, and all conceptions of time and space completely break down. And it doesn’t really exist.

What do astronomers learn from a redshift survey?

What do astronomers learn from a redshift survey? The redshift gives us the distance to galaxies.

Are there black holes between galaxies?

Astronomers believe that supermassive black holes lie at the center of virtually all large galaxies, even our own Milky Way. Astronomers can detect them by watching for their effects on nearby stars and gas. This chart shows the relative masses of super-dense cosmic objects.

Is wormhole travel possible?

Wormholes connect two points in spacetime, which means that they would in principle allow travel in time, as well as in space.

Is time infinite in a black hole?

You can’t escape from the black hole for the same reason you can’t escape from the future. Time doesn’t stop at the event horizon. If you fall into a black hole, time continues as normal for you as you pass the event horizon.

What does Z 0 mean in astronomy?

If a source of the light is moving away from an observer, then redshift (z > 0) occurs; if the source moves towards the observer, then blueshift (z < 0) occurs. This is true for all electromagnetic waves and is explained by the Doppler effect. Consequently, this type of redshift is called the Doppler redshift.

What is Z of a galaxy?

This value is typical of the galaxy redshifts found in the SkyServer database. Since the formula can be rewritten as z = v / c, it shows you how to interpret z: z measures the galaxy’s speed away from us relative to the speed of light.