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Old 16-12-17, 09:47   #1
 
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Earth Is 前umuamua an Alien Spacecraft?

Is 前umuamua an Alien Spacecraft? Initial Scans Show no Signs of Technology

Mysterious object detected hurtling through our solar system swept for radio signals, but scientists have found no evidence it is anything other than rock

The Guardian UK, 16 Dec 2017.



The first scans for alien technology aboard a mysterious object that is barreling through the solar system have found no evidence it is the work of an intelligent civilisation.

The cigar-shaped object was spotted hurtling through the solar system in October and while astronomers suspected it was an interstellar asteroid, its curious shape led them to propose sweeping it for radio signals in case it happened to be an alien craft.

While the long, slender object may have been well suited to flying through clouds of interstellar gas at breakneck speed, as some researchers noted, the observation that the body was tumbling through space suggests any aerodynamic advantage was at best minimal.

Scientists on the Breakthrough Listen project, funded by the internet billionaire Yuri Milner, used the Green Bank telescope in West Virginia to eavesdrop on the 400m-long body named 前umuamua, from the Hawaiian word for 杜essenger or 都cout. The body is twice as far from Earth as the sun, but the telescope is so sensitive it could detect transmissions as weak as those produced by a mobile phone.

But on Thursday, the astronomers declared that the first observations across four bands of the radio spectrum had found no evidence that 前umuamua is anything other than a long lump of space rock. Scientists on the project have released the data from the observations so anyone can study the information.

典his is a fishing expedition, said Avi Loeb, professor of astronomy at Harvard University and an adviser to the Breakthrough Listen project. 展e are most likely not to find anything, but it is worth checking steadily our fishing hooks. We will keep searching for artificial signals from 前umuamua or any other interstellar object that will be discovered in the future.

The first batch of four observations ran from 8.45pm UK time on Wednesday until 2.45am on Thursday morning and spanned a frequency range from 1 to 12 GHz. While the search for alien signals has so far found nothing in the 1.7 to 2.6GHz range, the rest of the data is still being processed.

Andrew Siemion, director of Berkeley Seti Research Center, told the Guardian that a review of all four bands observed Wednesday night had come up blank. 展e don稚 see anything continuously emitting from 前umuamua, he said. 展e池e now digging into some of the intermittent candidates, and trying some new machine learning-based techniques we have been working on. We expect our next observation window to be scheduled for Friday or Saturday, when we should get a view of additional phases of 前umuamua as it rotates.

The interstellar asteroid was first spotted by researchers on the Pan-Starrs telescope project in Hawaii as it swept past Earth at 85 times the distance to the moon. As 前umuamua sped towards the sun, it gathered speed, reaching 196,000mph. The body is moving so fast it will eventually leave the solar system completely.



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