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Black?holes?on?a?collision?course?

Black holes tending to collide?

Scientists?say?Chandra?provides?first?evidence ?That?two?such?mysteries?can?coexist?in?one?galaxy.?Scientists say that the Chandra Telescope has confirmed for the first time that two black holes can exist in the same galaxy. ?

In?a?very?bright?galaxy?400?million?light-years?away,?two?black?holes?are?drifting?toward?each?other?and?in?millions ?of?years?will?merge?with?an?eruption?of?energy?and?a?burst?of?gravitational?waves?that?could?warp?the?very?fabric?of?space,?astronomers? said?Tuesday.? Astronomers said on Tuesday that in a bright galaxy 400 million light years away from the earth, two black holes are approaching each other and will merge into one in millions of years and explode with a large amount of energy. The gravitational waves produced may affect every corner of the universe. ?

THE?SCIENTISTS?said?the?Chandra?X-ray?Observatory?has?found?the?first?evidence?that?two?immense?black?holes?can?coexist?in? the?same?galaxy?and?that?they?are?moving?toward?each?other?for?an?eventual?merger.?"Scientist" said that the Chandra X-ray telescope has found preliminary evidence that two Huge black holes can exist in the same galaxy at the same time, and they are moving closer to each other and will eventually merge into one. ?

The?double?black?holes?were?found?in?a?bright,?highly?active?galaxy?known?as?NGC6240,?about?400?million?light-years? from the Earth. This pair of black holes exists in an extremely active and bright galaxy, named NGC 6240, which is about 400 million light-years away from the Earth. ?

Astronomers?studied?NGC6240?because?it?produced?unexplained?bursts?of?X-rays?that?appeared?to?come?from?one?of?two?nuclei?at? the?galactic?center.?Images?collected?by?radio,?infrared?and?optical?observations?showed?two?bright?spots,?but?did?not?pinpoint?the?origin?of?the?X -rays.? The reason why astronomers study NGC6240 is that they discovered that there are two nuclei in the center of the galaxy, one of which constantly bursts out unexplained X-rays. Images collected from radio, infrared and optical observations showed two bright spots in the galaxy, but the source of the X-rays could not be pinpointed.

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When?Chandra,?with?its?sensitive?X-ray?detectors,?focused?on?the?nuclei,?astronomers?hoped?it?would?tell?them?whether?either ?of?the?two?points?of?activity?were?black?holes.?Chandra is equipped with a sensitive There is one for a black hole. ?

"Much?to?our?surprise,?we?found?that?both?were?active?black?holes,"?Stefanie?Komossa?of?the?Max?Planck?Institute? in Germany, said in a statement. Stefanie Komossa of the Max Planck Institute in Germany said in a statement: "We were surprised to find that both of them are active black holes."?

Finding?two?black?holes?in?one?galaxy,?said?Komossa,?"supports?the?idea?that?black?holes?can?grow?to?enormous?masses?in?the? "Centers of galaxies by merging with other black holes." Komossa said that the scientific discovery of the coexistence of two holes in the same galaxy proves that black holes in the core of galaxies can develop into massive matter by merging with each other. ?

An?artist's?conception?shows?two?black?holes?whirling?around?each?other?at?the?center?of?a?galaxy.?The artistic conception is: this Two black holes orbit each other at the center of the galaxy. ?

Guenther?Hasinger,?also?of?Max?Planck,?said?the?Chandra?images?captured?the?unmistakable?markings?of?two?black?holes?-?high- energy?photons?swirling?around?the?dense?black?hole?centers?and?X-rays?spewing?out?from?iron?atoms?being?pulled?into?the?center?at?a?high? Rate?of?speed.?Max?Planck's Guenther?Hasinger said that the images taken by Chandra captured signs that can confirm the coexistence of two black holes, that is, high-energy photons swirling around the very dense center of the black hole. , X-rays ejected from iron atoms are sucked into the center of the black hole at high speed. ?

Komossa?and?Hasinger?are?co-authors?of?a?study?submitted?for?publication?in?the?Astrophysical?Journal?Letters.?Hasinger and Komossa have co-authored articles In Astrophysical Letters.

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The?two?black?holes?in?NGC6240?are?now?about?3,000?light-years?apart?and?are?expected?to?merge?some?time?in? the?next?few?hundred?million?years,?the?researchers?said.?The?merger?will?be?accompanied?by?an?eruption?of?radiation?and?a?burst?of?gravitational? waves?that?will?spread?throughout?the?universe,?causing?ripples?in?the?fabric?of?space,?the?astronomers?said.? According to researchers, the two black holes in NGC6240 are currently separated by About 3,000 light-years away, it is expected that it will take hundreds of millions of years to merge with each other. At that time, a large amount of radiation and gravitational waves will be produced, impacting everywhere in the universe and causing ripples in space. ?

The?gravitational?ripples?could?cause?minute?changes?in?the?distance?between?any?two?points?in?the?universe,?they?said.?astronomer It is said that this kind of gravitational ripple will cause the distance between any two points in the universe to change slightly. ?

In?another?study,?French?and?Argentine?astronomers?said?that?observations?by?the?Hubble?Space?Telescope?and?ground-based?telescopes?have?detected ?a?stellar?black?hole?streaking?across?the?Milky?Way?at?about?250,000?miles?an?hour.?A?companion?star?is?being?dragged?along?and?slowly? Devoured?by?the?black?hole,?according?to?scientists?at?the?French?Atomic?Energy?Commission?and?the?Institute?for?Astronomy?and?Space?Physics?in?Argentina.? In a separate study, French and Argentinian astronomers said they discovered a planet's black hole traveling through the Milky Way at 250,000 miles per hour using the Hubble Space Telescope and ground-based telescopes. According to scientists from the French Atomic Energy Commission and the Argentinian Institute of Astronomy and Space Physics, there is another star trailing behind the black hole, and it is slowly being eaten away by the black hole.

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The?astronomers?said?the?stellar?black?hole?may?have?been?created?by?an?exploding?star?in?the?inner?disk?of?the? Milky?Way.?The?black?hole?is?6,000?to?9,000?light?years?away,?the?researchers?said.?A?report?on?the?observations?appears?Tuesday?in?the ?journal?Astronomy?and?Astrophysics.?

A?black?hole?is?a?point?in?space?that?is?so?dense?with?matter?that?its?gravitational ?field?will?not?let?anything?-?not?even?light?-?escape.?Stellar?black?holes,?equal?to?3.5?to?about?15?solar?masses,?can? be?formed?by?the?collapse?of?a?single?massive?star.?But?galactic?black?holes,?such?as?those?in?NGC6240,?are?much?larger,?equal? perhaps?to?millions?of?solar?masses,?and?are?usually?at?the?center?of?galaxies.The?Milky?Way,?home?galaxy?of?the?sun?and?its? planets,?is?thought?to?have?a?black?hole?at?its?center.With?its?immense?gravitational?pull,?a?black?hole?can?suck?in?gas,?dust ?and?other?matter?from?the?surrounding?space.?Entire?stars?can?be?stripped?and?pulled?into?the?bottomless?maw.?As?it?spirals?in?at?near ?light?speeds,?matter?captured?by?a?black?hole?heats?by?millions?of?degrees?and?gives?out?intense?radiation?in?several?parts?of?the?spectrum, ?including? ?A black hole is a point in space that is so dense that no matter or even light can escape its gravitational pull. The disintegration of a single giant star is enough to create a planetary black hole with a mass equivalent to 3.5 to 15 suns. But galactic black holes like the one in NGC 6240 are much larger, with a mass equivalent to millions of suns, and are typically located at the centers of galaxies. ?The Milky Way is the home of the sun and its nine planets. Scientists believe that there is a black hole in the center of the Milky Way. Relying on the strong gravitational pull, black holes can suck in gas, dust and other materials from the surrounding space. This bottomless pit even sucks in the entire planet after decomposing it.

When matter is captured by a black hole and is rotated and sucked into the hole at nearly the speed of light, it releases heat that can reach millions of degrees and emits different intense rays, including X-rays. The orbiting Chandra telescope can detect these X-rays and transmit the data back to Earth for astronomers to study. ?

NASA's?Chandra?X-ray?Observatory?was?launched?and?deployed?by?the?space?shuttle?Columbia?on?July?23,?1999.?NASA The Chandra X-ray Telescope was launched on July 23, 1999, aboard the Columbia spacecraft. ?

The cycle of life?

Facing?death,?Jeff?Cross?and?Lily?Cheng?had?run?out?of?options.?But?a?rare ?"domino"?liver?transplant,?involving?a?living?donor,?gave?both?a?future.?

Facing death, Jeff Cross and Cheng Lili have nothing else Chosen. But a rare "domino" liver transplant (involving a living organ donor) gave the two men a new lease of life. ?

Circle?of?Life?

Since?last?spring,?Jeff?Cross,?29,?had?been?tormented?by?night?sweats,?a ?side?effect?of?the?rare?genetic?illness?that?threatened?to?kill?him?unless?he?got?a?new?liver