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What are black holes really? Are they real? If so answer the question above. Please list sources, thanks.

2007-08-02 08:45:26 · 8 answers · asked by brookiielyn 2 in Science & Mathematics Astronomy & Space

8 answers

The closest black hole to earth, i believe, is the supermassive black hole at the center of the Milky Way galaxy. Black holes are Supermassive Stars that have run out of fuel and died, when they died their mass was too great to support itself so therefore it collapsed upon itself creating a black hole. the gravitational force from a black hole is so great that nothing can escape it, not even light.

2007-08-02 08:51:07 · answer #1 · answered by goodegs16 2 · 0 2

What is a black hole;
An object whose gravitational pull inside a certain radius is so strong that nothing, not even light can escape it. A black hole forms when the amount of matter in the core of a star undergoing a supernova is great enough to cause a runaway gravitational collapse


The dramatic tantrum last fall from an often-overlooked star has betrayed the existence of the nearest black hole yet discovered in the Milky Way -- one that should be put in a class all its own, a team of astronomers announced Friday.

The black hole, which is associated with a visible star called
V 4641, is being called a micro-quasar because it exhibited for a few days in September the brilliant behavior associated with quasars. It sent out tremendous bursts of X-ray radiation and shot out jets of plasma at some 90 percent the speed of light, said Robert Hjellming, of the National Radio Astronomy Observatory.

2007-08-02 08:57:58 · answer #2 · answered by justask23 5 · 0 0

A black hole is the core of a star that has collapsed under its own gravity.

With small stars (like our Sun), the star's core collapses down to the size of a small planet, then stops, held up by electron repulsion.

With larger stars, the gravity is stronger than electron repulsion, and all the charged particles are ejected from the star, leaving only neutrons behind. Then the core collapses further (down the size of a city), until repulsion between neutrons supports the weight of the star. The star is now called a neutron star.

With even larger stars, not even neutron repulsion supports the star's weight, and it collapses completely, down to ZERO size. It effectively disappears from the universe. It is now a black hole. It still has mass, and thus creates a gravitational field around it, and very near to the black hole, the gravity is so strong that not even light can escape. This region, where the gravity overpowers light, is called the event horizon, and it appears black, since nothing escapes it.

2007-08-02 08:54:44 · answer #3 · answered by lithiumdeuteride 7 · 0 0

An object many astronomers believe is a black hole has been found only 1500 light-years from Earth, making it the closest black hole candidate - V4641.

A black hole the core of a very massive star that exhausted it's fuel, and exploded - a supernova - blowing off huge amounts of mass, and compressing the core until the space around it couldn't "support" such a large mass in such a small volume.

2007-08-02 09:01:05 · answer #4 · answered by quantumclaustrophobe 7 · 0 0

ATLANTA - The dramatic tantrum last fall from an often-overlooked star has betrayed the existence of the nearest black hole yet discovered in the Milky Way -- one that should be put in a class all its own, a team of astronomers announced Friday.

The black hole, which is associated with a visible star called V 4641, is being called a micro-quasar because it exhibited for a few days in September the brilliant behavior associated with quasars. It sent out tremendous bursts of X-ray radiation and shot out jets of plasma at some 90 percent the speed of light, said Robert Hjellming, of the National Radio Astronomy Observatory.

Hjellming and colleagues from the Massachusetts Institute of Technology made the announcement here at the meeting of the American Astronomical Society.

Quasars are thought to be black holes billions of times more massive than the sun that lie at the heart of active galactic nuclei. They are extremely energetic X-ray emitters that shoot out tremendous fountains of plasma at velocities approaching the speed of light. These jets stretch for thousands of light-years, puzzling astrophysicists

2007-08-02 08:55:29 · answer #5 · answered by Anonymous · 0 1

There is a black hole in the middle of each Galaxy . It furnishes the gravity that keeps all the solar systems in orbit around the black hole.

2007-08-02 09:14:19 · answer #6 · answered by JOHNNIE B 7 · 0 0

incredibly adult males, a Black hollow isn't a hollow. that's a collapsed action picture star. and because stellar plenty do flow in the process the galaxy and can flow rogue (we are monitoring quite a few stars that escaped from the galactic middle's black hollow and are trucking at incredibly severe speeds), that's achieveable for such an merchandise to bypass close adequate to nudge us out of orbit without destroying us. historic past Channel's "The Universe" coated that one. And it does no longer even might desire to be a black hollow to do what the asker defined. Any great rogue merchandise that receives interior of selection to result us with its gravity can shove us out of place. this may well be yet another planet (larger or extra massive than Earth), a gas sizeable, brown dwarf, action picture star or using fact the asker reported, a black hollow. Frankly on your difficulty, if we lose photograph voltaic radiation, we are toast. the ambience could start to freeze into liquid gases and dry ice, Me could be waiting to save some human beings for a whilst utilising the warmth from our middle (brought about by utilising gravity's pressures on the mass of the planet squeezing the middle), yet that would desire to be a great way fewer than your difficulty and finally the chilly could win.

2016-10-09 01:56:51 · answer #7 · answered by ramswaroop 4 · 0 0

Center of the milkyway, our galexy. We know they exist. Source... my brain. or nasa.gov.

2007-08-02 08:48:45 · answer #8 · answered by nate q 3 · 0 2

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