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& # 39; Oumuamua mia! Space exploration of aliens? – News info: technology

Did the solar solar powered awning of foreign civilization visit us last year? Or is the Oumuamua a fully functional spacecraft sent by the aliens deliberately to Earth? If such questions are asked in a trade diary, most work will doubt the seriousness of the authors and the broadcasting environment.

However, in addition to Shmuel Bialy, a small researcher at Harvard University, Abraham Loeb is also included in the related publications. Heng Loeb is one of the most respected theoretical astrophysics in the world,, says Kevin Heng, director of the Center for Space and Habitability at the University of Bern. "Director of the Department of Astronomy at Harvard University and Director of the Theory and Computing Institute." This work will not be published anywhere next week, but will be published in the prestigious "Astrophysical Journal Letters" magazine.

Interstellar object

The reputation of Loeb does not automatically mean that what the two investigators claim is true. . But at least it means we have to look carefully at what they're offering. “

In his publications, Loeb and Bialy pay attention to the extraordinary trajectory of Oumuamua (& # 39; Hawaiian for the messenger) & # 39; The object was discovered by the Pan-Starrs-1 telescope in Hawaii on October 19, 2017. At first it looked like a typical little asteroid moving at high speed. However, closer observation undoubtedly revealed that this celestial body did not originate from our solar system, but from interstellar space, ie stars, like all the others previously observed.

There were more surprises in Oumuamua. A team of astronomers in Hawaii discovered that the brightness of the object has changed dramatically by a tenfold, as it revolves around its axis every 7.3 hours. This powerful change in brightness means that the Oumuamua is very elongated, so it is in the form of a cigar or maybe a pancake. It is estimated to be at least 400 meters in length and competes at approximately 300,000 kilometers per hour along the solar system.

«Fully functional space probe»?

Recently, researchers from the Italian astronomer Marco Micheli in Nature reported that Oumuamua could not be explained by the sun's gravitational effects. The acceleration was like a comet spreading gas. But in Oumuamua, there was no evidence of gas emissions common to comets as they approached the sun.

If you are not charitable activity, then what can Oumuamua do? If Loeb and Bialy are an extremely thin object driven by the solar wind, then momentum can be explained. So only 0.3 to 0.9 millimeters thick & # 39; Oumuamua & # 39; should be.

What kind of object can this be? This question starts a more speculative part of the study. As stated by Heng in the University of Bern, Loeb also heads the advisory board of the Breakthrough Starshot Initiative, which aims to send a spaceship to the closest star. The spaceship must be equipped with a sunshade and must be powered by the solar wind. It is not surprising, therefore, that the author düşün Oumuamua “suggests that it can be a gigantic awning that acts as a space rubble from a distant civilization through our solar system.

Alternatively, the authors suggest an even more exotic scenario. Therefore, uzay Oumuamua can be a fully functional spacecraft sent deliberately by the alien civilization around the world.

Maybe a comet

Martin Jutzi from the Department of Space Research and Planetology, University of Bern, finds the work "very interesting". However, only the Oumuamua will be very speculative due to the acceleration of a tent or observed acceleration for the observed probe to close. "To me, as always, there are simpler and better explanations. Of course, these are less sensational."

Jutzi makes it clear that he cannot really explain the observations of a sun-sailing spacecraft. Ir A possible problem is the directing of extremely thin awnings. Yel Another is collisions with interstellar dust particles that could damage the sail. Although this article is discussed in the article, it does not discuss the possible mechanical damage caused by collisions.

As Marco Micheli wrote in his study of Nature, potential overrun of Oumuamua may be undetectable because it is below the detection threshold. "In my opinion, the observed non-gravitational acceleration can therefore be explained by the throttle suppression," Jutzi said. "This probably means that it is a comet-like object."

In our time, searching for artificial objects from other planetary systems is no longer science fiction.Kevin Heng, Director of Space and Habitability Center at the University of Bern

But this scenario is even controversial, Jutzi continues. Bir The study needs to be shown in detail. Fre As a result, the theoretical models suggested that interstellar comets appeared at a certain frequency in our solar system. "You probably don't need an exotic explanation as presented in Bialy and Loeb's article."

Unfortunately, it is too late to investigate Oumuamua in more detail. The object is far away from the Earth to work with telescopes or to visit a spacecraft. So there's no other option that researchers write, more than just looking for other objects of this kind.

"This is one of the important messages in this publication," says Heng. Inden We live at a time when it is reasonable to search for artifacts from other planetary systems and no longer science fiction. " Nothing can come from this research. But now it is important that you can test such ideas with Bialy and Loeb's coworkers. "It's part of the scientific method."

(Editors Tamedia)

Created: 07.11.2018, 18:00

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