Direct evidence for a supermassive black hole
Why are there black holes at the center of galaxies?
Of the black holes that we have, most of them fall into the category of “stellar mass” black holes, meaning that they arose from
stars and have masses that individual stars also possess
. … “[You've said] that most galaxies have a supermassive black hole at the center.
What evidence suggests that massive black holes exist in galaxies?
The best evidence of stellar-mass black holes comes from
binary star systems
in which (1) one star of the pair is not visible, (2) the flickering X-ray emission is characteristic of an accretion disk around a compact object, and (3) the orbit and characteristics of the visible star indicate that the mass of its …
Is there a massive black hole at the center of the galaxy?
For several years the scientific community has agreed that there is a mass at the center of the Milky Way galaxy and that the mass is a
supermassive black hole
—it has been named Sagittarius A*.
What are the 4 types of black holes?
And anything that ventures too close—be it star, planet, or spacecraft—will be stretched and compressed like putty in a theoretical process aptly known as spaghettification. There are four types of black holes:
stellar, intermediate, supermassive, and miniature
.
How did Einstein predict black holes?
Most famously, black holes were predicted by Einstein's theory of general relativity, which showed that
when a massive star dies, it leaves behind a small, dense remnant core
. … If a black hole passes through a cloud of interstellar matter, for example, it will draw matter inward in a process known as accretion.
How many black holes are in the center of the Milky Way?
The Milky Way galaxy contains some 100 billion stars. Roughly one out of every thousand stars that form is massive enough to become a black hole. Therefore, our galaxy must harbor some
100 million
stellar-mass black holes. Most of these are invisible to us, and only about a dozen have been identified.
Will a black hole come to earth?
Absolutely not
. While a black hole does have an immense gravitational field, they are only “dangerous” if you get very close to them. … It would get very dark of course and very cold, but the black hole's gravity at our distance from it would not be a concern. Is there life on other planets?
What is the biggest thing in the universe?
The largest known ‘object' in the Universe is
the Hercules-Corona Borealis Great Wall
. This is a ‘galactic filament', a vast cluster of galaxies bound together by gravity, and it's estimated to be about 10 billion light-years across!
What's inside a black hole?
HOST PADI BOYD: While they may seem like a hole in the sky because they don't produce light, a black hole is not empty, It's actually
a lot of matter condensed into a single point
. This point is known as a singularity.
Is there a black hole in the center of the universe?
Yes,
there is a very large black hole at the center of our Galaxy
. It has a mass of about three million suns and is very far from Earth at a distance of about 24,000 light-years. Huge black holes are thought to occur naturally at the center of most large galaxies and many have already been detected.
What would happen if you fell into a black hole?
If you fell into a black hole left over when a star died,
you would be shredded
. Also, the massive black holes seen at the center of all galaxies have insatiable appetites. And black holes are places where the laws of physics are obliterated. … Galaxies where the black holes are active are called quasars.
Did Einstein believe in black holes?
Over a century ago,
Albert Einstein predicted that the gravitational pull of black holes were so strong that they should bend light right around them
. Black holes don't emit light, they trap it; and ordinarily, you can't see anything behind a black hole.
What are 10 facts about black holes?
- You Can't Directly See a Black Hole. …
- Our Milky Way Probably Has a Black Hole. …
- Dying Stars Lead to Stellar Black Holes. …
- There are Three Categories of Black Holes. …
- Black Holes Are Funky. …
- The First Black Hole Wasn't Discovered Until X-Ray Astronomy was Used.
What are the 3 categories of black holes?
So far, astronomers have identified three types of black holes:
stellar black holes, supermassive black holes and intermediate black holes
.
When our sun dies it will make a black hole?
First of all,
the Sun is never going to turn into a black hole
. Only the most massive stars become black holes at the end of their lives. Little stars, like the Sun, die in a different way. When these stars burn up all the hydrogen in their cores, they swell into red giants.
