NASAs Hubble telescope has revealed a real space battle. <\/p>\n
Researchers found that around 1400, in theOrion Nebula, a group of stars was engaged in an even more impressive battle. <\/p>\n
The gravitational tussle ended with the system breaking apart and at least three stars being ejected in different directions. <\/p>\n<\/p>\n
The stars went unnoticed for hundreds of years, NASA revealed. <\/p>\n
However, over the past few decades, two of them were spotted in infrared and radio observations, which were able to penetrate the thick dust in the Orion Nebula. <\/p>\n
The observations showed that the two stars were traveling at high speeds in opposite directions from each other. <\/p>\n
The stars origin, however, was a mystery. <\/p>\n
Astronomers traced both stars back 540 years to the same location and suggested they were part of a now-defunct multiple-star system. <\/p>\n
But the duos combined energy, which is propelling them outward, didnt add up. <\/p>\n
The researchers reasoned there must be at least one other culprit that robbed energy from the stellar toss-up. <\/p>\n
Now NASAs Hubble Space Telescope has helped astronomers find the final piece of the puzzle by spotting a third runaway star. <\/p>\n
The astronomers followed the path of the newly found star back to the same location where the two previously known stars were located 540 years ago. <\/p>\n
The trio reside in a small region of young stars called the Kleinmann-Low Nebula, near the center of the vast Orion Nebula complex, located 1,300 light-years away. <\/p>\n
All three stars are moving extremely fast on their way out of the Kleinmann-Low Nebula, up to almost 30 times the speed of most of the nebulas stellar inhabitants. <\/p>\n
Based on computer simulations, astronomers predicted that these gravitational tugs-of-war should occur in young clusters, where newborn stars are crowded together. <\/p>\n
But we havent observed many examples, especially in very young clusters, Luhman said. <\/p>\n
The Orion Nebula could be surrounded by additional fledging stars that were ejected from it in the past and are now streaming away into space. <\/p>\n
What often happens when a multiple system falls apart is that two of the member stars move close enough to each other that they merge or form a very tight binary. <\/p>\n
In either case, the event releases enough gravitational energy to propel all of the stars in the system outward. <\/p>\n
The energetic episode also produces a massive outflow of material, which is seen in the NICMOS images as fingers of matter streaming away from the location of the embedded source I star. <\/p>\n<\/p>\n
The teams results will appear in the March 20, 2017 issue of The Astrophysical Journal Letters. <\/p>\n
Luhman stumbled across the third speedy star, called source x, while he was hunting for free-floating planets in the Orion Nebula as a member of an international team led by Massimo Robberto of the Space Telescope Science Institute in Baltimore, Maryland. <\/p>\n
The team used the near-infrared vision of Hubbles Wide Field Camera 3 to conduct the survey. <\/p>\n
During the analysis, Luhman was comparing the new infrared images taken in 2015 with infrared observations taken in 1998 by the Near Infrared Camera and Multi-Object Spectrometer (NICMOS). <\/p>\n
He noticed that source x had changed its position considerably, relative to nearby stars over the 17 years between Hubble images, indicating the star was moving fast, about 130,000 miles per hour. <\/p>\n
The astronomer then looked at the stars previous locations, projecting its path back in time. <\/p>\n
He realized that in the 1470s source x had been near the same initial location in the Kleinmann-Low Nebula as two other runaway stars, Becklin-Neugebauer (BN) and source I. <\/p>\n<\/p>\n
BN was discovered in infrared images in 1967, but its rapid motion wasnt detected until 1995, when radio observations measured the stars speed at 60,000 miles per hour. <\/p>\n
Source I is traveling roughly 22,000 miles per hour. <\/p>\n
The star had only been detected in radio observations; because it is so heavily enshrouded in dust, its visible and infrared light is largely blocked. <\/p>\n
The three stars were most likely kicked out of their home when they engaged in a game of gravitational billiards, Luhman said. <\/p>\n
What often happens when a multiple system falls apart is that two of the member stars move close enough to each other that they merge or form a very tight binary. <\/p>\n
In either case, the event releases enough gravitational energy to propel all of the stars in the system outward. <\/p>\n
The energetic episode also produces a massive outflow of material, which is seen in the NICMOS images as fingers of matter streaming away from the location of the embedded source I star. <\/p>\n<\/p>\n<\/p>\n
<\/p>\n
Read more: NASAs Hubble telescope has revealed a real space battle. Researchers found that around 1400, in theOrion Nebula, a group of stars was engaged in an even more impressive battle. The gravitational tussle ended with the system breaking apart and at least three stars being ejected in different directions Continue reading
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