Astronomers hypothesize that there's a supermassive black hole at the center of our galaxy, the Milky Way, both because of physical theory about the formation of galaxies, and direct observation from our own and other galaxies. Recent observations, focused on the behavior of stars very close to the nucleus of the Milky Way, led to a somewhat compelling conclusion: various stars at the galactic core could be tracked orbiting an object which was itself not directly observable (consistent with a black hole). The simple fact they were in orbit indicated the presence of a massive object. The maximum radius of the object they were orbiting had to be inside the closest approach of the nearest star in orbit, hence placing an upper limit on the radius of the object. The orbital radius and orbital period of the stars provided limits for the measurement of the amount of mass present in the object they orbited. Since the lower limit of the mass had to fit inside the maximum radius that the stars didn't collide with, the only object fitting the observations would be a supermassive black hole, of a little over four million solar masses.
A very small region at the center of M87 releases an enormous amount of energy.
That's because they actually observed it.
They spotted a bunch of stars orbiting around in the center at crazy speeds around what appears to be nothing but the only thing that could have that much mass to swing those stars around like moons would have to be insanely dense which could only be justified by being a super massive black hole
Yes. We're currently orbiting a super-massive black hole located in the center of our galaxy.
The super-massive black hole at the center of MY galaxy is about 25,000 light years from me. Not sure how far away you are from the center of YOUR galaxy, however.
A very small region at the center of M87 releases an enormous amount of energy.
That's because they actually observed it.
Astronomers suspect that a super massive black hole is at the center of the Milky Way. Over a period of several years, astronomers have observed that stars near the center of the Milky Way are orbiting an object with massive gravitation, and the object emits no light. What can it be? A black hole is the best answer, and by the way the stars move, it must a super massive one.
A super massive black hole.
They spotted a bunch of stars orbiting around in the center at crazy speeds around what appears to be nothing but the only thing that could have that much mass to swing those stars around like moons would have to be insanely dense which could only be justified by being a super massive black hole
Astronomers believe that black holes exist in the center of every universe. They even think that there may be a black hole in the center of our galaxy, the Milky Way
The galactic center of the Milky Way is a compact object of very large mass (named Sagittarius A), strongly suspected to be a supermassive black hole.
Hypothesis are just well educated guesses. They think that because what else has enough gravity to hold in millions of billions of stars, planets, solar system. The only answer that we can understand at the moment would be that supermassive black holes hold together galaxys. There is also a small compilation of pictures showing stars moving at very very high speeds around a central object. One that we can only guess is a supermassive black hole.
The very center is believed to contain a very powerful black hole.
That is not yet known for sure. Most large galaxies have a supermassive black hole in their center. It is known how a massive star can convert to a black hole, but it is not currently known how such a black hole would acquire such a huge mass since its creation.
It is now widely accepted that all galaxies have a massive black hole at their centre.
All galaxies have supermassive black holes in their centers.