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Arecibo Observatory will be demolished

      Arecibo’s days are done. After two support cables failed in recent months, the radio observatory’s 305-meter-wide dish is damaged beyond repair, the National Science Foundation announced on November 19. It will be decommissioned and dismantled.

     The telescope, famous for appearances in movies like GoldenEye and Contact, consists of a wide dish to collect radio waves from space and focus them into detectors housed in a dome suspended above the dish.

     In August, one of the cables that holds up the dome slipped out of a socket and punched a hole in the dish. Then a second cable unexpectedly broke on November 6. If a third cable were to break, it could send the platform holding up the dome swinging, or the whole structure could collapse. 

     The NSF determined that there was no safe way to repair the telescope. 

Adaptado de https://www.sciencenews.org/article/arecibo-telescope-observatory-icon-puerto-rico-science-demolished. 

NASA, US and European Partners Launch Mission to Monitor Global Ocean

    A joint U.S.-European satellite built to monitor global sea levels lifted off on a SpaceX Falcon 9 rocket from Space Launch Complex 4E at Vandenberg Air Force Base in California Saturday at 9:17 a.m. PST (12:17 p.m. EST).

    About the size of a small pickup truck, Sentinel-6 Michael Freilich will extend a nearly 30- year continuous dataset on sea level collected by an ongoing collaboration of U.S. and European satellites while enhancing weather forecasts and providing detailed information on large-scale ocean currents to support ship navigation near coastlines. 

    "The Earth is changing, and this satellite will help deepen our understanding of how," said Karen St. Germain, director of NASA's Earth Science Division. "The changing Earth processes are affecting sea level globally, but the impact on local communities varies widely. International collaboration is critical to both understanding these changes and informing coastal communities around the world." 

    After arriving in orbit, the spacecraft separated from the rocket's second stage and unfolded its twin sets of solar arrays. Ground controllers successfully acquired the satellite's signal, and initial telemetry reports showed the spacecraft in good health. Sentinel-6 Michael Freilich will now undergo a series of exhaustive checks and calibrations before it starts collecting science data in a few months' time.

Fonte: https://www.nasa.gov/press-release/nasa-us-and-european-partners-launch-mission-to-monitor-global-ocean>acesso 16 de dezembro de 2020.

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       Plans for international trips in 2020 were brought to an abrupt halt by the Covid-19 pandemic. Around the world, once-crowded sights lay dormant.

     The statistics speak for themselves. On 13 October, the International Air Transport Association (IATA) said that international traffic “has all but disappeared”, with airlines carrying only about 10% of normal levels.

    By IATA’s estimate, Covid-caused disruptions put more than 41 million jobs at risk across the travel and tourism sector.

   In the absence of travellers, tourism boards, hotels and destinations have turned to virtual reality (VR) — a technology still in its relative infancy — to keep would-be visitors interested and prepare for the long road to recovery.

    What began for many as a temporary stop-gap measure may now be a long-term tool. IATA predicts that travel will not resume to pre-pandemic levels until 2024.

   Faced with a new reality of diminished tourism, many believe that Covid-19 might be the watershed moment for VR that changes perceptions from a clever and occasional marketing trick to a permanent fixture of tourism marketing.  

Internet: <www.bbc.com> (adapted).