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Factor control, field activity: “Oumuamua: Asteroid, Comet or Alien Spacecraft?

By: Express News Service | New Delhi |Published: November 12, 2018 12:56:15 A European Southern Observatory's artist's impression of "Oumuamua."…

By: Express News Service | New Delhi |

Published: November 12, 2018 12:56:15

 Factor control, field activity: Oumuamua: Asteroid, Comet or Alien Spacecraft?

A European Southern Observatory’s artist’s impression of “Oumuamua.”

On October 19, 2017, astronomers who ran an instrument in the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS) 1 instrument in Maui, Hawaii discovered an unusual object that blasted out of the constellation Lyra about 32 million km from the ground and looped over solar system against an unknown target. It was too small to act as more than just a bright spot even on large telescopes, but it was apparently an unusually elongate object rotated around an axis and tumbled out through space because its brightness varied dramatically every 7-8 hours – brightest when the whole The length meets the earth, almost invisible when it pointed to the earth. It went more than 87km / second – fast enough to escape the sun’s gravity. Researchers are called “Oumuamua, Hawaiian for” scout “or” a messenger sent from far to reach us “and concluded that the red-brown stone-shaped like a cigar – about 800m long and 80m wide; extreme proportions never observed before was the first interstellar object ever seen in the solar system.

Was it an asteroid?

Scientists initially assumed that it was a comet, but they also noted that they had no visible “coma” (atmosphere of dust and gas around a comet’s core) or “tail” (elongated clouds pointing out of the sun), signature identifiers of comets as they approach the inner solar system. In a paper in the wild in November 2017, the team as discovered “Oumuamua with Pan-STARRS 1 telescope in color and imputed properties, “Oumuamua resembled famous asteroids. It could have come from the star Vega in Lyra, known to have a rubbish disc, however,” the possibility of “Oumuamua has kr etched in the galaxy for billions of years is not ruled out “.

Or was it a comet?

In June 2018, Professor Marco Micheli of the European Space Agency’s SSA-NEO Coordination Center in Frascati, Italy, made the case that “Oumuamua was a comet after all – and currently proposed a new way of detecting comets.” In January 2018, Hubble noted space rally that “Oumuamua was speedy – it was more than 40,000 km ahead of the expected track – and Dr. Micheli said” it was something that affects its motion other than the solar gravitational forces and planets “. While the acceleration of “Oumuamua” was due to the jumping of volatile materials or “gasification” (as it happens with comets), the fact that this was not visible as a tail is because the dust around the core of this comet was probably “made of larger grain which was too heavy to be lifted by the gas, “Dr Micheli said to the Indian Express.

Maybe a spacecraft?

In a paper approved for publication in The Astrophysical Journal Letters, Abraham Loeb, Chairman of the Harvard Astronomical Department, and his colleague, Shmuel Bialy, claim that “a more exotic scenario [that explains ‘Oumuamua’s sudden acceleration] is that” Oumuamua can be a completely operational probe that is deliberately sent to the earth’s presence of an alien civilization. ” The authors say they “discuss the possible origin of such an object, including the possibility that it may be a lightsail [a type of spacecraft propulsion device] of artificial origin”.

The possibility that “Oumuamua is a foreign spacecraft had been discussed and discarded in the first paper written on it.” Our observations are completely consistent with the fact that it is a natural object, “the New York Times said. Dr. Karen J Meech, leader of Pan -STARRS 1 team, like a year ago.

“Like most researchers, I would love to be there to be convincing evidence of alien life, but it is not,” said AFP Alan Fitzsimmons, an astrophysicist, as said Theoretical astrophysician Dr Katherine Mack tweeted: “… Researchers are happy to publish an outlandish idea if it even has the slightest slings of a chance not to be wrong. But until all other possibilities have been exhausted dozens of times over, the authors probably do not believe it. “US physicist Don Lincoln wrote to CNN that although the hypothesis was not” hopeless crackpottery “, it was” highly unlikely “and claimed the Standard Standard, astronomer Carl Sagan’s aphorism as” Extraordinary Claims, Requires Extraordinary Evidence. “

AFP quoted Dr. Bialy who says, “I would not say I think” sent by foreigners, as I am a researcher, and not a believer, I rely on evidence to present a possible physical explanation for observed phenomena. “

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