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A mysterious cigar-shaped object spotted tumbling through our solar system last year may have been an alien spacecraft sent to investigate Earth, astronomers from Harvard University have suggested.The object, nicknamed 'Oumuamua, meaning "a messenger that reaches out from the distant past" in Hawaiian, was first discovered in October 2017 by the Pan-STARRS 1 telescope in Hawaii.Since its discovery, scientists have been at odds to explain its unusual features and precise origins, with researchers first calling it a comet and then an asteroid, before finally deeming it the first of its kind: a new class of "interstellar objects."Now, a new paper by researchers at the Harvard Smithsonian Center for Astrophysics raises the possibility that the elongated dark-red object, which is 10 times as long as it is wide and traveling at speeds of 196,000 mph, might have an "artificial origin.""'Oumuamua may be a fully operational probe sent intentionally to Earth vicinity by an alien civilization," they wrote in the paper, which has been submitted to the Astrophysical Journal Letters.The theory is based on the object's "excess acceleration," or its unexpected boost in speed as it traveled through and ultimately out of our solar system in January 2018."Considering an artificial origin, one possibility is that 'Oumuamua is a light sail, floating in interstellar space as a debris from an advanced technological equipment," wrote the paper's authors, suggesting that the object could be propelled by solar radiation.The paper, written by Abraham Loeb, professor and chair of astronomy, and Shmuel Bialy, a postdoctoral scholar, at the Harvard Smithsonian Center for Astrophysics, points out that comparable light-sails already exist on earth."Light-sails with similar dimensions have been designed and constructed by our own civilization, including the IKAROS project and the Starshot Initiative. The light-sail technology might be abundantly used for transportation of cargos between planets or between stars."In the paper, the pair theorize that the object's high speed and its unusual trajectory could be the result of it no longer being operational."This would account for the various anomalies of 'Oumuamua, such as the unusual geometry inferred from its light-curve, its low thermal emission, suggesting high reflectivity, and its deviation from a Keplerian orbit without any sign of a cometary tail or spin-up torques."'Oumuamua is the first object ever seen in our solar system that is known to have originated elsewhere.At first, astronomers thought the rapidly moving faint light was a regular comet or an asteroid that had originated in our solar system.Comets, in particular, are known to speed-up due to a process known as "outgassing," in which the sun heats up the surface of the icy comet, releasing melted gas. But 'Oumuamua didn't have a "coma," the atmosphere and dust that surrounds comets as they melt.Multiple telescopes focused on the object for three nights to determine what it was before it moved out of sight. 3063

A sharply divided U.S. Supreme Court has denied a rural Nevada church’s request to strike down as unconstitutional a 50-person cap on worship services as part of the state’s ongoing response to the coronavirus. In a 5-4 decision Friday, the high court refused to grant the request from the Christian church east of Reno to be subjected to the same COVID-19 restrictions in Nevada that allow casinos, restaurants and others to operate at 50% of capacity. The church argued the hard cap on religious gatherings was an unconstitutional violation of its First Amendment rights. Chief Justice John Roberts sided with the majority in denying the request without explanation. 676

A new self-driving shuttle bus got off to a bumpy start in Las Vegas.When the service debuted in the city on Wednesday, one of the driverless vehicles was involved in a collision with a delivery truck, the Las Vegas government said in a statement.During the incident in downtown Las Vegas, the bus automatically stopped to try avoid an accident after its sensors detected the truck, the city said. 405

A Pennsylvania judge has sided with President Donald Trump’s campaign and ordered counties not to count a small number of mail-in or absentee ballots for which the voter didn’t submit valid identification within six days after the Nov. 3 election.The injunction issued Thursday by Commonwealth Court Judge Mary Hannah Leavitt deals with an as-yet unknown number of ballots that may number a few thousand or fewer.While the Trump campaign’s general counsel, Matt Morgan, called the order a “win,” the ballots affected may not have been tabulated and are unlikely to affect the outcome in Pennsylvania.The Associated Press called the presidential contest for Democrat Joe Biden on Saturday after determining the remaining ballots in Pennsylvania would not allow Trump to catch up.Biden held an approximately 55,000-vote margin Thursday night. But Trump has refused to concede, and his campaign and Republican allies have several lawsuits pending.The court order affects a subset of about 10,000 ballots that arrived within three days of polls closing, a period allowed by the state Supreme Court because of concerns over the pandemic and delays in the U.S. Postal Service. 1178

A new self-driving shuttle bus got off to a bumpy start in Las Vegas.When the service debuted in the city on Wednesday, one of the driverless vehicles was involved in a collision with a delivery truck, the Las Vegas government said in a statement.During the incident in downtown Las Vegas, the bus automatically stopped to try avoid an accident after its sensors detected the truck, the city said. 405