Astronomers have concluded that
quasars
are active young galaxies with giant black holes in their centers. Black holes are the remains of the most massive stars when they die. A black hole is an object with gravity so strong that nothing, not even light, can escape.
Does every galaxy have a black hole at its center?
In fact, most galaxies have supermassive black holes, and that's what Patreon supporter Steve Shaber wrote in to ask about: “[You've said] that
most galaxies have a supermassive black hole at the center
. … Here's the science behind the galaxies without a supermassive black hole at their centers.
Is there a black hole at the center of the universe?
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. … Historically, astronomers have long believed that no mid-sized black holes exist.
What is a quasar galaxy?
Quasar,
an astronomical object of very high luminosity found in the centres of some galaxies
and powered by gas spiraling at high velocity into an extremely large black hole. … Quasars are among the most distant and luminous objects known.
What is in the center of our galaxy?
The centre of the galaxy is a dense and chaotic place, with stars and gas hurtling around the Milky Way's
supermassive black hole, Sagittarius A*
. It has a mass more than 4 million times the mass of the sun crammed into a diameter just about 30 times the sun's width.
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 happens if you go into a black hole?
The event horizon of a black hole is
the point of no return
. Anything that passes this point will be swallowed by the black hole and forever vanish from our known universe. At the event horizon, the black hole's gravity is so powerful that no amount of mechanical force can overcome or counteract it.
How old is our galaxy?
Astronomers believe that our own Milky Way galaxy is
approximately 13.6 billion years old
. The newest galaxy we know of formed only about 500 million years ago.
What is the light at the center of a galaxy?
The diffuse light
is the combined light from millions of stars. Some of the light from these stars are obscured by large clouds of dust, which is why there are dark patches. Dust and gas are necessary to form stars, and most stars are formed within the spiral arms.
What would happen if a quasar hit Earth?
The illumination from a quasar, along with all the radiation it throws off, would
mess with Earth's atmosphere
. The light is enough to energize particles that make up the atmosphere and frees them from Earth's gravity. … Without it, Our atmosphere would be destroyed. And we really need our atmosphere.
What is the brightest object in the universe?
The brightest object in the universe has been discovered,
a quasar
from when the universe was just 7 percent of its current age. The quasar, now known as PSO J352. 4034-15.3373 (P352-15 for short), was discovered 13 billion light-years away from Earth by the Very Long Baseline Array (VLBA) radio telescope.
What is the most destructive force in the universe?
Black holes
are the most destructive force in the universe. But they may also be necessary for the creation of galaxies.
What's at the Centre of a black hole?
At the center of a black hole, as described by general relativity, may lie
a gravitational singularity
, a region where the spacetime curvature becomes infinite. … When they reach the singularity, they are crushed to infinite density and their mass is added to the total of the black hole.
Why is the center of the galaxy so bright?
The object
hosts a fearsome magnetic field as well
, and it's this force that drags charged particles like electrons spiraling inwards, making them glow. Dust stops visible light from making it all the way to Earth, some 26,000 light years out in the disk, but infrared radiation can get around it.
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.
