Black holes

But what are all the stars circling around? Black holes are regions of space that have such strong gravity, nothing can escape them. They just pull things close and then suck them in.

Black holes

Exoplanets Black Holes Don't let the name fool you: Rather, it is a great amount of matter packed into a very small area - Black holes of a star ten times more massive than the Sun squeezed into a sphere approximately the diameter of New York City.

The result is a gravitational field so strong that nothing, not even light, can escape. In recent years, NASA instruments have painted a new picture of these strange objects that are, to many, the most fascinating objects in space. Intense X-ray flares thought to be caused by a black hole devouring a star.

Video Watch the Video The idea of an object in space so massive and dense that light could not escape it has been around for centuries. 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 the core's mass is more than about three times the mass of the Sun, the equations showed, the force of gravity overwhelms all other forces and produces a black hole.

A video about black holes. Watch the video Scientists can't directly observe black holes with telescopes that detect x-rays, light, or other forms of electromagnetic radiation. We can, however, infer the presence of black holes and study them by detecting their effect on other matter nearby.

If a black hole passes through a cloud of interstellar matter, for example, it will draw matter inward in a process known as accretion. A similar process can occur if a normal star passes close to a black hole. In this case, the black hole can tear the star apart as it pulls it toward itself.

As the attracted matter accelerates and heats up, it emits x-rays that radiate into space. Recent discoveries offer some tantalizing evidence that black holes have a dramatic influence on the neighborhoods around them - emitting powerful gamma ray bursts, devouring nearby stars, and spurring the growth of new stars in some areas while stalling it in others.

One Star's End is a Black Hole's Beginning Most black holes form from the remnants of a large star that dies in a supernova explosion. Smaller stars become dense neutron stars, which are not massive enough to trap light.

Black holes

If the total mass of the star is large enough about three times the mass of the Sunit can be proven theoretically that no force can keep the star from collapsing under the influence of gravity. However, as the star collapses, a strange thing occurs.

As the surface of the star nears an imaginary surface called the "event horizon," time on the star slows relative to the time kept by observers far away. When the surface reaches the event horizon, time stands still, and the star can collapse no more - it is a frozen collapsing object.

Astronomers have identified a candidate for the smallest-known black hole.Aug 28,  · Click here to read a transcript of this story. Space is a pretty dark place. Even so, some areas are darker than others. Nothing is darker than a black hole. A black hole is an area of such immense gravity that nothing—not even light—can escape from it.

Black holes .

Black holes may answer questions about the beginning and the future of the universe. Black holes may solve some of the mysteries of the universe. A black hole is a place in space where gravity pulls so much that even light cannot get out. Black Holes. Everything in space seems to be orbiting something.

Moons orbit planets and planets orbit nationwidesecretarial.com what are all the stars circling around? The answer: extremely powerful objects called black holes. Black holes are regions of space that have such strong gravity, nothing can escape them.

Black holes are among the strangest things in the universe. They are massive objects – collections of mass – with gravity so strong that nothing can escape, not even light. The most common types of black holes are the stellar-mass and supermassive black holes. Stellar-mass black holes are created when massive stars explode, leaving behind [ ].

Black holes may solve some of the mysteries of the universe. A black hole is a place in space where gravity pulls so much that even light cannot get out.

Black Holes | Science Mission Directorate