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They know because the effect the black hole has on other matter.
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What is more dense black hole or star?
A black hole is more dense. In principle, the black hole exists all at one point. So its volume is zero, and its density is infinite.
What is known about the supermassive black hole at the center of our galaxy?
Not much actually. Scientists are still looking into it. What they do know though is that it has eaten up everything around it. Because of that, the supermassive black hole exists in a pitch black, empty area in the center of the Milky Way.
Is a black hole know as a singularity?
No the singularity is at the core of the black hole.
Does a black hole ever get full?
According to current theory, a black hole, if it exists, begins its life full,and nothing that falls into it ever leaves it.
How many stars did this black hole eat?
Don't know which black hole.
What is a black hole for children?
Black Holes are space vacuum cleaner, it sucks everything into it; planets, stars, galaxy, even light. Black holes are invisible, but we know that it exists because it distort light and stars disappearing.
Does M65 galaxy have a black hole?
Yes, the M65 galaxy is thought to have a supermassive black hole at its center, like many other large galaxies. This black hole likely plays a crucial role in shaping the galaxy's properties and evolution.
How do scientist know were a black hole is?
Because there is usually nothing around the spot where the black hole is because the black hole "ate" everything.
Can you make a black hole inside a black hole?
We know nothing about the conditions within a black hole, but it seems unlikely that a black hole could exist within a black hole, or even if this concept would have any meaning at all.
What is inside of the black hole?
Nothinness, anything that even goes near a black hole is sucked in and ripped apart by the intence gravity until it no longer exists, this i suppose is why the center of a black whole is infintely small.
What happens when ice is added to canola oil and how does the temperature change?
A black hole is formed and no temperature exists
What is the super-massive structure that exists in the middle of nearly all galaxies?
A super massive black hole.
