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Three years ago, we detected the first interstellar object passing through the Solar System, `Oumuamua’. Ever since, astronomers have been debating the origins of this strange body. Among several hypothesis for its origin, there is the possibility that it could be alien technology. Video below is a discussion of this theory and the counter-arguments proposed, written & presented by Prof David Kipping. Thanks to Dr Sean Raymond for fact checking, in the video published on Jan 17, 2021, “Is ‘Oumuamua Alien Technology?“, below: Avi Loeb is a theoretical physicist in the fields of astrophysics and cosmology. He is also the author of the best-selling book, “Extraterrestrial: The First Sign of Intelligent Life Beyond Earth.” In the video below, Loeb explains why the interstellar object known as Oumuamua could be evidence of alien technology, in the video published on March 22, 2021, “Was Earth visited by intelligent life? Astrophysicist Avi Loeb believes it was“, below: To find out more about Oumuamua and Avi Loeb, please refer to the excerpt from wikipedia, in italics, below: ʻOumuamua is the first known interstellar object detected passing through the Solar System. Formally designated 1I/2017 U1, it was discovered by Robert Weryk using the Pan-STARRS telescope at Haleakalā Observatory, Hawaii, on 19 October 2017, 40 days after it passed its closest point to the Sun on 9 September. When it was first observed, it was about 33 million km (21 million mi; 0.22 AU) from Earth (about 85 times as far away as the Moon), and already heading away from the Sun. ʻOumuamua is a small object estimated to be between 100 and 1,000 metres (300 and 3,000 ft) long, with its width and thickness both estimated to range between 35 and 167 metres (115 and 548 ft).^[11] It has a red color, similar to objects in the outer Solar System. Despite its close approach to the Sun, ʻOumuamua showed no signs of having a coma, but did exhibit non‑gravitational acceleration.^[21][22] Nonetheless, the object could be a remnant of a disintegrated rogue comet (or exocomet), according to astronomer Zdenek Sekanina.^[23][24] The object has a rotation rate similar to the average spin rate seen in Solar System asteroids, but many valid models permit it to be more elongated than all but a few other natural bodies. While an unconsolidated object (rubble pile) would require it to be of a density similar to rocky asteroids,^[25] a small amount of internal strength similar to icy comets^[26] would allow a relatively low density. ʻOumuamua’s light curve, assuming little systematic error, presents its motion as tumbling, rather than smoothly rotating, and moving sufficiently fast relative to the Sun that it is likely of an extrasolar origin. Extrapolated and without further deceleration, ʻOumuamua’s path cannot be captured into a solar orbit, so it would eventually leave the Solar System and continue into interstellar space. ʻOumuamua’s planetary system of origin and the age of its excursion are unknown. In July 2019, astronomers concluded that ʻOumuamua is most likely a natural object. A small number of astronomers suggested that ʻOumuamua could be a product of alien technology, but evidence in support of this hypothesis is weak.^[27][28] In March 2021, scientists presented a theory based on nitrogen ice that ʻOumuamua may be a piece of an exoplanet, similar to the dwarf planet Pluto, from beyond our solar system.^{[29][30][31][32]}

Alien object hypothesis

On 26 October 2018, theoretical physicist Avi Loeb and his postdoc Shmuel Bialy submitted a paper exploring the possibility of ʻOumuamua being an artificial thin solar sail^[119][120] accelerated by solar radiation pressure, in an effort to help explain the object’s comet-like non-gravitational acceleration.^{[63][64][121]} Other scientists have stated that the available evidence is insufficient to consider such a premise,^{[122][123][124]} and that a tumbling solar sail would not be able to accelerate.^[125] In response, Loeb wrote an article detailing six anomalous properties of ʻOumuamua that make it unusual, unlike any comets or asteroids seen before.^[126][127] A subsequent report on observations by the Spitzer Space Telescope set a tight limit on cometary outgassing of any carbon-based molecules and indicated that ʻOumuamua is at least ten times more shiny than a typical comet.^[128] The alien object hypothesis is considered unlikely by many experts.^[129][130] Abraham “Avi” Loeb (Hebrew: אברהם (אבי) לייב‎; born February 26, 1962) is an Israeli–American theoretical physicist who works on astrophysics and cosmology. Loeb is the Frank B. Baird Jr. Professor of Science at Harvard University. He had been the longest serving Chair of Harvard’s Department of Astronomy (2011–2020), Founding Director of Harvard’s Black Hole Initiative (since 2016) and Director of the Institute for Theory and Computation (since 2007) within the Harvard-Smithsonian Center for Astrophysics.^{[1][2][3][4][5][6]} Loeb is a fellow of the American Academy of Arts and Sciences, the American Physical Society, and the International Academy of Astronautics. In July 2018, he was appointed as chair of the Board on Physics and Astronomy (BPA)^[7] of the National Academies, which is the Academies’ forum for issues connected with the fields of physics and astronomy, including oversight of their decadal surveys. In June 2020, Loeb was sworn in as a member of the President’s Council of Advisors on Science and Technology (PCAST) at the White House.^[8][9] In December 2012, TIME magazine selected Loeb as one of the 25 most influential people in space.^[10] In 2015, Loeb was appointed as the Science Theory Director for the Breakthrough Initiatives of the Breakthrough Prize Foundation. In 2018, he attracted media attention for suggesting that alien space craft may be in our solar system, using the anomalous behavior of ‘Oumuamua as an example.^[11] In 2019, and together with his Harvard undergraduate student, Amir Siraj, Loeb reported discovering a meteor that potentially originated outside the Solar System.^[12] Most scientists assume that the universe must be populated with innumerable alien intelligences and civilizations – after all, we humans can’t be so special. OK, so where are they, these “innumerable alien intelligences and civilizations”? How come there’s zero evidence? Featuring interviews with Jill Tarter, Douglas Vakoch, Frank Drake, Raymond Kurzweil, Francisco Ayala, Steven Dick, and David Brin, in the video published on Feb 24, 2021, “Where Are They, All Those Aliens? Episode 305, Closer To Truth“, below: What are scientists looking for when searching for alien life? A lot, it turns out: the search for extraterrestrials requires the help from astronomers, planetary scientists, chemists, computer scientists, and geneticists, just to name a few. But are we barking up the wrong carbon-based tree? Could alien life develop in ways we haven’t dreamed of here on Earth? Hear Paul Davies, Sara Seager, Jack Szostak, and other experts give updates on the search for life outside our planet in “Alien Life: Will We Know It When We See It?” part of the Big Ideas series at the 2014 World Science Festival. This program is part of the Big Ideas Series, made possible with support from the John Templeton Foundation, in the video published on July 17, 2014, “Alien Life: Will We Know It When We See It? “, below: In the video published on Dec 2, 2018, “Why Harvard Scientists Think This Object Is An Alien Spacecraft“, below: Professor Avi Loeb is a respected astrophysicist, former chair of Harvard’s Astronomy Department, and a published author. In his new book, Loeb writes that we may have had a brush with an alien civilization a couple of years ago. Michelle Miller has the details, in the video published on Feb 27, 2021, “Author Avi Loeb on evidence of close extraterrestrial encounters, new book“, below: Is the interstellar visitor ‘Oumuamua an artifact of alien technology? Are scientists really hostile to an alien hypothesis? How can we use this example to demonstrate what good science looks like? In the video published on Jan 29, 2021, “Is ‘Oumuamua Alien Technology? – Ask a Spaceman!” below: Jill Tarter, former Director of the Center for SETI Research, and Robert Lawrence Kuhn, Host of “Closer To Truth”, talk the search for alien life, alien technology and technosignatures, the Fermi Paradox, risks from encountering alien civilizations, and the future of SETI (Search for ExtraTerrestrial Intelligence) and mankind, in the video published on Aug 3, 2020, “Jill Tarter on Alien Intelligences, Extraterrestrial Technology, and SETI, Closer To Truth Chats“, below: Do intelligent aliens exist? Who knows? But here’s what I do know: The potential existence of intelligent aliens probes meaning and purpose in the universe. Featuring interviews with Martin Rees, Frank Drake, Lawrence Krauss, Gregory Benford, and Jaron Lanier, in the video published on Aug 16, 2020, “What Would Alien Intelligence Mean? Episode 904, Closer To Truth“, below: Do intelligent aliens exist? Who knows? But here’s what we do know: the potential existence of intelligent aliens probes meaning and purpose in the universe. What would it mean if the universe were teeming with life? What would it mean if we humans were alone?  In the video published on March 27, 2020,  “Jill Tarter – What would Intelligent Aliens Mean?“, below: Are we alone in this vast universe? Some think that’s highly unlikely. With new technologies joining the search, NASA estimates we’ll find definitive evidence of aliens within 20 to 30 years. Which raises the vital question: And then what? Will the news inspire jubilation, despair, or fear? Will aliens be seen as gods or interlopers? Evidence of alien life will provoke fundamental questions about our place in the universe–not just about who they are, but also who we are. Join astronomers, astrobiologists, anthropologists, philosophers, and linguists as we ponder these issues, in the video published on May 17, 2019, “Alien Contact: What Happens Next?” below: Gathered, written, and posted by Windermere Sun-Susan Sun Nunamaker More about the community at www.WindermereSun.com Any comments, suggestions, concerns regarding this post will be welcomed at info.WindermereSun@gmail.com

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