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- Sentinel était un projet de télescope spatial américain chargé de recenser et caractériser les astéroïdes géocroiseurs conçu par des scientifiques et astronautes américains et proposé par la Fondation B612. Le projet a été annulé à la suite de la décision de la NASA d'arrêter son financement et de développer la mission NEO Surveyor qui reprend l'objectif de Sentinel. (fr)
- The Sentinel Space Telescope was a space observatory to be developed by Ball Aerospace & Technologies for the B612 Foundation. The B612 Foundation is dedicated to protecting the Earth from dangerous asteroid strikes and Sentinel was to be the Foundation's first spacecraft tangibly to address that mission. The space telescope was intended to locate and catalog 90% of the asteroids greater than 140 metres (460 ft) in diameter that exist in near-Earth orbits. The telescope would have orbited the Sun in a Venus-like orbit (i.e. between Earth and the Sun). This orbit would allow it clearly to view the night half of the sky every 20 days, and pick out objects that are currently often difficult, if not impossible, to see in advance from Earth." Sentinel would have had an operational mission life of six and a half to ten years. After NASA terminated their funding agreement with the B612 Foundation in October 2015 and the private fundraising goals could not be met, the Foundation eventually opted for an alternative approach using a constellation of much smaller spacecraft under study as of June 2017. NASA/JPL's NEOCam has been proposed instead. (en)
- O telescópio espacial Sentinel é um observatório espacial atualmente sendo projetado e construído para a Fundação B612, e em desenvolvimento pela Ball Aerospace & Technologies. (pt)
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- Artist rendering of the Sentinel Space Telescope (en)
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- Sentinel Space Telescope (en)
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- Sentinel était un projet de télescope spatial américain chargé de recenser et caractériser les astéroïdes géocroiseurs conçu par des scientifiques et astronautes américains et proposé par la Fondation B612. Le projet a été annulé à la suite de la décision de la NASA d'arrêter son financement et de développer la mission NEO Surveyor qui reprend l'objectif de Sentinel. (fr)
- O telescópio espacial Sentinel é um observatório espacial atualmente sendo projetado e construído para a Fundação B612, e em desenvolvimento pela Ball Aerospace & Technologies. (pt)
- The Sentinel Space Telescope was a space observatory to be developed by Ball Aerospace & Technologies for the B612 Foundation. The B612 Foundation is dedicated to protecting the Earth from dangerous asteroid strikes and Sentinel was to be the Foundation's first spacecraft tangibly to address that mission. (en)
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- Sentinel (télescope spatial) (fr)
- Sentinel Space Telescope (en)
- Telescópio espacial Sentinel (pt)
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- Sentinel Space Telescope (en)
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