If the first interstellar object ever discovered in our solar system is an alien spacecraft, it operates in stealth mode.…
If the first interstellar object ever discovered in our solar system is an alien spacecraft, it operates in stealth mode.
A search for radio signals coming from “Oumuamua, the mysterious visitor from what was zoomed in by the inner solar system this autumn, came out empty, a new study report.”
“We were looking for a signal that would show that this item contains some technique ̵
1; that it was of artificial origin “, leading author Gerry Harp, from the SETI (Search for Extraterrestrial Intelligence) Institute in Mountain View, California, said in a statement. [‘Oumuamua: Our 1st Interstellar Visitor Explained in Photos]
” We found no such emissions, despite a rather sensitive search, “Harp added.” While our observations do not conclusively rule out an indispensable source for “Oumuamua”, they constitute important tasks to access their likely makeup. “
Harp and his colleagues used the SETI Institute’s Allen Telescope Array (ATA), a system of 42 dishes in North Africa, to listen to possible “Oumuamua signals from November 23 to December 5 last year . At that time, the bizarre cigar-shaped object was about 170 million miles (275 million miles) from the ground – almost twice as far from our planet to the sun.
The team listened to pings with a frequency between 1 and 10 gigahertz, with a resolution of 100 kilohertz. The observation campaign could pick up signals produced by a Omnidirectional Transmitter with a power between 30 and 300 milliwatts, the researchers said.
“In any case, these limits for the capabilities that can be detected are quite modest – comparable to that for mobile phones or citizen band radios,” the SETI Institute representatives wrote in the same statement.
Harp and his team were not the only group to listen to “Oumuamua last fall”. $ 100 million breakthrough listening project also tried its hand, with the Robert C. Byrd Green Bank Telescope in western Virginia. That search also did not appear.
SETI researchers are so interested in “Oumuamua because of the origins and strangeness of the object.” Oumuamua is a remarkable tumbling, needle-shaped body that is likely to be six times longer than it is wide. And while cruising through the neighborhood of the earth at the end of last year, it showed the nongravitational acceleration movement that can not be attributed to the tow of the sun, plan or other objects.
The leading statement claims that “Oumuamua is a strange comet, and the odd movement was the result of gasification. (When the comets come close to the sun and heat up, jets often blow out of their ice surfaces. Such rays can act as small thrusters, push the bodies in this way and so.)
But some researchers have speculated that “Oumuamua can be a spacecraft of some kind, perhaps a reconnaissance test to check the necks of our cosmic forest. Harvard astronomers Shmuel Bialy and Avi Loeb recently presented such a case, declaring that “Oumuamua could be a” sailboat “powered by starlight.
Unfortunately, such speculation about “Oumuamuas can rule forever. The object fled beyond the reach of our most powerful telescope long ago, so we will not get a fresh look at it.”
The new study will be published in February 19th, the issue of Acta Astronautica.
Mike Wall’s book on “Out There” (Grand Central Publishing, 2018, illustrated by Karl Tate) is out now. Follow him on Twitter @ michaeldwall . Follow us @Spacedotcom or Facebook. Originally published on Space.com.