www.Universe-Forum.com

[fiber]

Let speak about Black Holes.
What is a black hole?

[fiber]

A Black Hole is a region of spacetime from which nothing can escape, even light.
To understand why this happens, imagine throwing any thing into the air. The harder you throw the thing, the faster it is travelling when it leaves your hand and the higher the thing will go before turning back. If you throw it hard enough it will never return, the gravitational attraction will not be able to pull it back down.
As a body is crushed into a smaller and smaller volume, the gravitational attraction increases, and hence the escape velocity gets bigger. Things have to be thrown harder and harder to escape. Eventually a point is reached when even light, which travels at 186 thousand miles a second, is not travelling fast enough to escape. At this point, nothing can get out as nothing can travel faster than light.
This is a Black Hole.

[stargirl]

What maximum size the black hole can have?
Is there a minimum and a maximum size to black holes?

[Roiglobal]

What maximum size the black hole can have?
Is there a minimum and a maximum size to black holes?

Black holes can have any mass from 0.00001 grams to 10 billion times the mass of the Sun(or more). These supermassive Black Holes are found in the cores of 'active galaxies' and quasars. Astronomers have never seen a black hole that is much smaller than the mass of our Sun yet, so we don't know if they really exist.

[POTATOES]

And I`m interested in a question, whether large black holes with each other are connected?

[Roiglobal]

What is a black hole?

Thought about large Black Holes in galaxies began with the discovery of quasars in the 1960s.
Astronomers soon realized that the exceptional gravitational field of a large Black Hole was the necessary "machine" for generating the prodigious amounts of energy blasted into space by a quasar.
But astronomers accomplished that the light from a quasar represented only 1/10 of the mass that must be devoured by the Black Hole.
Where was this large fuel supply coming from?
The discovery of many other kinds of active galactic nuclei in the 1970s also required a process of Black Hole feeding early in a galaxy's life.
This meant that Black Hole increase is not an incidental process in the life of a galaxy.
But Black Holes could not be confidently detected in a broad sample of galaxies.
Until Hubble came along with the precise accuracy to measure the velocity of matter trapped close into the black hole and "weigh" its mass.
The research team's next step is to look for the smallest nuclear Black Holes that can be detected with Hubble.
This information will help astronomers understand the mechanism for the seed Black Holes that grew so rapidly during galaxy formation.

[Tony26]

How can a black hole have mass if it's a hole?

[Roiglobal]

How can a black hole have mass if it's a hole?

[Roiglobal]

You in avatar have put similar

[Bug]

Black hole isn't really a hole.

[googlewoman]

A Black Hole is a theoretical region of space occupied by matter in which the gravitational field is so mighty that nothing, not even electromagnetic radiation , can escape its pull after having fallen past its event horizon.
The term "Black Hole" derives from the fact that the absorption of visible light renders the 'hole' invisible, indistinguishable from the black space around it. It’s generally accepted by most cosmologists that black holes do exist in our universe.

[googlewoman]

How can a black hole have mass if it's a hole?

Сheck wiki out if you want to know more…..

[Bug]

Imagine that a black hole is like a spinning top, the part that spins is the black hole but in order to spin it has to have the axial part that you twist in order to spin it. This axis is the singularity, it isn't actually part of the black hole but it is necessary for the hole to exist.

[googlewoman]

Well, you come up with an analogy!

[Venus]

How big can a black hole grow?