Wednesday , October 20 2021

Interstellar Visitors Another Blank Search


'' Oumuamua Mute Remains: Interstellar Visitors Another SETI Search Comes Empty

An illustration of an artist's interstellar visitor lama Oumuamua u showing the secretion behavior like comet.

Credits: NASA / ESA

If the first interstellar object detected in our solar system is actually an alien spacecraft, it works in hidden mode.

In a new study report, the search for radio signals from the 'Oumuamua', a mysterious visitor who was approached last autumn with the inner solar system, is finished.

; We were looking for a signal to prove that this object was made up of some technologies, n says author Gerry Harp, a research fellow at SETI (Mountain Search Center), in Mountain View, California. Statement. [‘Oumuamua: Our 1st Interstellar Visitor Explained in Photos]

"We did not find such an emission despite a very delicate search," he added. "Although our observations precisely exclude a non-natural origin for Oumuamua, they create important data for access to their makeup."

Arp and his colleagues set the SETI Institute's Allen Telescope Array (ATA), a radio system in Northern California, with possible & # 39; Oumuamua signals from November 23 last year. 39; At that time, the peculiar cigar-shaped object was about 170 million miles (275 million kilometers) from the Earth – our planet's distance from the sun almost doubled.

The team listened to pings at a frequency of 1 to 10 gigahertz with a resolution of 100 kilohertz. Researchers noted that the observation campaign is able to collect signals generated by a versatile transmitter with a power of between 30 and 300 milliwatts.

"In any case, these limits to the powers that can be determined are quite modest – comparable to cell phones or citizen group radios."

Arp and his team weren't the only band that gave ear to Oumuamua last fall. The $ 100 million Breakthrough Listening project has also tried its hand using the Robert C. Byrd Green Bank Telescope in West Virginia. Nothing happened in this search.

SETI scientists are very interested in Oumuamua because of the provenance and oddity of the object. Ir Oumuamua is an oddly needle-shaped body with a needle that is about six times longer than the wide one. And last year, during the course of his journey through the neighborhood, he exhibited non-gravitational acceleration that could not be attributed to the tugboats of the sun, planets, or other objects.

In a leading statement, it appears that the 'Oumuamua' was an alien comet and the strange movement was the result of the epidemic. (When comets get closer to the sun and warm up, jets often pop up on icy surfaces, such jets can move like small thrusters, thus pushing the bodies.)

Some scientists, however, thought that ece Oumuamua could be a kind of spacecraft, perhaps a discovery investigation that was tasked with controlling the neck of cosmic trees. The Harvard astronomers Shmuel Bialy and Avi Loeb have recently put up a case like this, and have said, could have been a star sail.

Unfortunately, this speculation about 'Oumuamua' will reign forever. The object escaped as our most powerful telescopes didn't reach long ago, so we'll probably never look again.

The new work will be published in the February 2019 issue of Acta Astronautica.

Mike Wall's book on the research of alien life, "Out There" (Grand Central Publishing, pictured by Karl Tate, 2018), is currently out there. Follow her on Twitter @michaeldwall. Follow us I @Spacedotco or Facebook. Originally published in

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