Satellites

Subterms

    More stories

    • 138 Shares139 Views

      in Elections

      A Global Push Fixed the Ozone Hole. Satellites Could Threaten It.

      by

      A sharp increase in hardware orbiting Earth could mean more harmful metals lingering in the atmosphere, according to a new study.Low-Earth orbit, a layer of superhighway that wraps around Earth’s thermosphere some 200 to 600 miles above our heads, is newly congested.Yet no one knows how the vast increase in satellites orbiting Earth will affect the atmosphere, and therefore life down below. With the rush to send up more and more satellites, a new study proposes that the hole in the ozone layer, a problem scientists thought they had solved decades ago, could make a comeback.“Up until a few years ago, this was not a research area at all,” Martin Ross, an atmospheric scientist at Aerospace Corporation, said of the study, which looked at how a potential increase in man-made metal particles could eat away at Earth’s protective layer.Ever since Sputnik, the first man-made space satellite, was launched in 1957, scientists have thought that when satellites re-enter our atmosphere at the end of their lives, their vaporization has little impact. But new satellites — much more advanced, but also smaller, cheaper and more disposable than previous satellites — have a turnover that resembles fast fashion, said the lead author of the study, José Pedro Ferreira, a doctoral candidate in astronautical engineering at the University of Southern California.Almost 20 percent of all satellites ever launched have re-entered Earth’s atmosphere in the last half-decade, burning up in superfast, superhot blazes.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

    • 113 Shares99 Views

      in Elections

      See the New Satellite Tracking Methane Pollution from Space

      by

      Source: 3-D model via MethaneSAT and Fair Worlds Six years ago, scientists at the nonprofit Environmental Defense Fund were wrapping up a major research project to measure methane leaks from oil and gas sites across Texas. Everywhere they looked — using planes, drones, ground measurements and even handheld devices — they found that gas was […] More

    • 163 Shares119 Views

      in Elections

      U.S. Warns Allies Russia Could Put a Nuclear Weapon Into Orbit This Year

      by

      The American assessments are divided, however, and President Vladimir Putin denied having such an intention, saying that Russia was “categorically against” it.American intelligence agencies have told their closest European allies that if Russia is going to launch a nuclear weapon into orbit, it will probably do so this year — but that it might instead launch a harmless “dummy” warhead into orbit to leave the West guessing about its capabilities.The assessment came as American intelligence officials conducted a series of rushed, classified briefings for their NATO and Asian allies, as details of the American assessment of Russia’s intentions began to leak out.The American intelligence agencies are sharply divided in their opinion about what President Vladimir V. Putin is planning, and on Tuesday Mr. Putin rejected the accusation that he intended to place a nuclear weapon in orbit and his defense minister said the intelligence warning was manufactured in an effort to get Congress to authorize more aid for Ukraine.During a meeting with the defense minister, Sergei K. Shoigu, Mr. Putin said Russia had always been “categorically against” placing nuclear weapons in space, and had respected the 1967 Outer Space Treaty, which prohibits weaponizing space, including the placement of nuclear weapons in orbit.“We not only call for the observance of the existing agreements that we have in this area,” he was quoted as saying by the Russian state media, “but we have proposed many times to strengthen these joint efforts.”On Wednesday, Mr. Putin reinforced the central role he believes Russia’s nuclear arsenal plays in the country’s defenses: Visiting an aviation factory, he climbed into the bomb bay of a Tu-160M strategic bomber, the most modern in the Russian fleet.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More

    • 125 Shares149 Views

      in Elections

      U.S. Fears Russia Might Put a Nuclear Weapon in Space

      by

      American spy agencies are divided on whether Moscow would go so far, but the concern is urgent enough that Secretary of State Antony J. Blinken has asked China and India to try to talk Russia down.When Russia conducted a series of secret military satellite launches around the time of its invasion of Ukraine in early 2022, American intelligence officials began delving into the mystery of what, exactly, the Russians were doing.Later, spy agencies discovered Russia was working on a new kind of space-based weapon that could threaten the thousands of satellites that keep the world connected.In recent weeks, a new warning has circulated from America’s spy agencies: Another launch may be in the works, and the question is whether Russia plans to use it to put a real nuclear weapon into space — a violation of a half-century-old treaty. The agencies are divided on the likelihood that President Vladimir V. Putin would go so far, but nonetheless the intelligence is an urgent concern to the Biden administration.Even if Russia does place a nuclear weapon in orbit, U.S. officials are in agreement in their assessment that the weapon would not be detonated. Instead, it would lurk as a time bomb in low orbit, a reminder from Mr. Putin that if he was pressed too hard with sanctions, or military opposition to his ambitions in Ukraine or beyond, he could destroy economies without targeting humans on earth.Despite the uncertainties, Secretary of State Antony J. Blinken raised the possibility of the Russian nuclear move with his Chinese and Indian counterparts on Friday and Saturday on the sidelines of the Munich Security Conference.Mr. Blinken’s message was blunt: Any nuclear detonation in space would take out not only American satellites but also those in Beijing and New Delhi.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe. More