| 单词 | retrorocket |
| 例句 | At four hours and thirty-three minutes into the flight, the retrorockets fired. Hidden Figures 2016-09-06T00:00:00Z If she had fired her retrorockets when originally instructed to, she would have been pushed farther out into space without a way to return. Women in Space 2014-02-01T00:00:00Z For future Mars missions, the inflatable heat shield would be combined with other systems like parachutes and retrorockets to guide the lander en route to a soft landing. NASA Launched an Inflatable Flying Saucer Then Landed It in the Ocean 2022-11-10T05:00:00Z Another technology is retrorockets, used to take over from parachutes in the final stages of descent. Europe fights to keep Mars rover alive after split with Russia 2022-03-28T04:00:00Z Seconds later — 1.3 miles up — eight retrorockets on the descent stage fire, slowing the craft and flying it toward its target. NASA’s Mars rover, Perseverance, aims for dicey landing to search for ancient life 2021-02-16T05:00:00Z But the air is too thin to slow a lander with only a parachute, so Tianwen-1’s lander must fire retrorockets at the exact right time to stop its descent. China’s Tianwen-1 enters Mars orbit 2021-02-10T05:00:00Z On 18 February, NASA’s SUV-size rover, Perseverance, will take the plunge, slowed by parachutes and retrorockets on a “sky crane” platform. The science stories likely to make headlines in 2021 2020-12-31T05:00:00Z It will deploy a parachute and then a ‘sky crane’ system — similar to that used by Curiosity — that will fire retrorockets to slow it down as it approaches the planet’s surface. NASA has launched the most ambitious Mars rover ever built: here’s what happens next 2020-07-29T04:00:00Z ESA tested some simple retrorockets in 2016 with its Schiaparelli lander, which crashed in its final approach to Mars because of a software error. Europe fights to keep Mars rover alive after split with Russia 2022-03-28T04:00:00Z With thrusters for control, the probe will streak towards its landing site, pop a parachute and then cut it loose, descending the final 10km to the surface on eight retrorockets. Seeking life on Mars: Nasa prepares to launch its latest rover 2020-07-30T04:00:00Z Just as for Curiosity, a “sky crane” hovering on retrorockets will unspool Perseverance on a tether and lower it to the ground. NASA’s new rover will collect martian rocks—and clues to planet’s ancient climate 2020-06-25T04:00:00Z But its air is too thin for a parachute alone to slow a lander; retrorockets are needed as well. Mars mission would put China among space leaders 2020-06-25T04:00:00Z Eight retrorockets on the descent stage then fire, allowing the "sky crane" manoeuvre to be performed. Nasa Mars rover: Key questions about Perseverance 2020-06-23T04:00:00Z But if ESA was just looking for RHUs and retrorockets, “these could be provided by suppliers in the United States,” he says. Europe fights to keep Mars rover alive after split with Russia 2022-03-28T04:00:00Z They fire retrorockets to land on the moon and eventually return to splash down in the Pacific Ocean. Let's move to Mars: the best books about our future in space 2020-03-23T04:00:00Z Sufficiently slowing a lander in the thin air requires plenty of sophisticated kit, including designer heat shields, powerful retrorockets, and, sometimes, giant airbags. European Mars rover in a ‘race against time’ to fix parachutes 2019-11-26T05:00:00Z It would touch down in August 2028, after Mars's dust storm season, most likely using retrorockets guided by a new technology called terrain relative navigation. Bold space mission to bring back rocks from Mars takes shape 2019-11-21T05:00:00Z The von Braun design, Fishman writes, “kept the astronauts close to home, so if something went wrong with the rendezvous, they could simply fire their retrorockets and return to Earth.” Review | The dreams and dedication behind our leap to the moon 2019-07-11T04:00:00Z Based on NASA’s Phoenix spacecraft, which landed in 2008, InSight uses retrorockets to slow the craft directly, rather than a “sky crane” to lower itself like Curiosity. NASA lander will plunge to Mars today in harrowing 6-minute descent 2018-11-26T05:00:00Z Like its predecessor, it will use parachutes and retrorockets to reach the surface. By listening for quakes on Mars, NASA lander will probe Red Planet’s interior 2018-04-18T04:00:00Z After a journey lasting three to six months, those ships would fire up some supersonic retrorockets and gently land on the Red Planet, depositing human cargo and supplies. Elon Musk: In Seven Years, SpaceX Could Land Humans on Mars 2017-09-29T04:00:00Z Closer landings risk damage to sites of historical importance, from the blast of a retrorocket or a collision. Here's who could win the $20 million XPrize for roving on the moon—but will any science get done? 2016-12-22T05:00:00Z Its parachute was jettisoned too early and its retrorockets, designed to slow the robot to a hover just above the surface, fired only for a few seconds. Schiaparelli: Mars probe 'crash site identified' - BBC News 2016-10-21T04:00:00Z Next, its retrorockets switched on, but only for three or four seconds rather than the 30 seconds required to slow Schiaperelli down sufficiently for a gentle landing. How the ExoMars Schiaparelli lander may have met its fate on Mars 2016-10-20T04:00:00Z For now, Musk plans to continue developing supersonic retrorockets that can gradually and gently lower a much heavier spacecraft to the Martian surface, using his reusable Falcon 9 boosters as a model. Elon Musk: A Million Humans Could Live on Mars By the 2060s The craft would slow themselves to touch down on Mars with retrorockets—much like the sky crane that lowered NASA’s Curiosity rover to the Martian surface in 2012. Watch: Elon Musk’s Audacious Plan for Putting Humans on Mars When Curiosity landed, the retrorockets used to help lower the rover kicked up some debris, damaging one of the vehicle's sensors. How SpaceX's Red Dragon could change the way we land on Mars 2016-04-29T04:00:00Z There’s a small crater nearby where the capsule’s retrorockets fired to slow its descent at the last minute. See the Happy Chaos at Astronauts' Landing Site 2016-03-04T05:00:00Z The harpoons and retrorockets meant to hold it there did not work, but the lander did not fly off into space. Philae’s scientific harvest may be its last 2015-07-30T04:00:00Z It hopes to outfit its Falcon 9 rockets with wings and retrorockets so they can land on autonomous barges in the ocean. SpaceX and Boeing are on their way to launching US astronauts, NASA says 2015-01-26T05:00:00Z The retrorockets were glitchy too, failing to ignite automatically at the correct moment—a problem, but a correctable one, since the astronauts were trained to take over and light the motors manually. Remembering Pioneering Astronaut Scott Carpenter 2013-10-11T01:05:23Z In the past, getting hardware to Mars has required complex engineering, using a combination of heat shields, retrorockets, parachutes, and more. How SpaceX's Red Dragon could change the way we land on Mars 2016-04-29T04:00:00Z Finally, in December, they found candidates for four pieces of Mars 3’s hardware: the parachute, the heat shield, the retrorocket, and the lander. The Countdown, Episode 20 - Star Factory, Five New Exoplanets, Saturn Ring Rain, Planet-Naming Controversy, Missing Mars Lander Found 2013-04-19T11:45:11.540Z The first images from the rover’s navigation cameras suggested one possibility when they revealed whitish linear features in a shallow trench scoured out by the blast of the landing system’s retrorockets. Mars scientists await feast of data 2012-08-15T17:20:52.890Z Such as the remarkable landing system of Mars Curiosity that featured a giant parachute, retrorockets and the gentle controlled lowering of the one-ton rover with cables. New geek chic 2012-08-14T17:45:00Z Among the new tools in play: a 51-foot diameter parachute with eight suspension lines—the biggest ever used in an extraterrestrial landing—and retrorockets designed to slow the craft almost to a hover. Mars Curiosity Rover: Wheels Down on the Red Planet 2012-08-06T15:35:28Z All eight throttleable retrorockets on the descent stage, also called the Mars landing engine, begin to fire to slow the craft down. The Curiousity's Perilous Landing (The Plan) 2012-08-06T06:44:09Z At 900 kilograms, Curiosity is too heavy to land in airbags like earlier rovers, and retrorockets like those used in the Viking Mars landings of the 1970s would kick up damaging dust. 7 minutes of terror 2012-08-01T17:50:34.210Z So after jettisoning the no-longer needed heat shield, the ship will fire retrorockets that will slow it a crawl that actually approaches a hover. The Coolest Mars Landing Ever Attempted 2012-07-31T15:05:22Z The airbags inflated explosively from its sides at the same time that retrorockets on the back shell ignited. Sky Crane - how to land Curiosity on the surface of Mars 2011-11-29T04:15:21.007Z Not only do retrorockets add substantial weight for the rover to then carry around the surface, but rockets protruding on its underside also create a potential sticking hazard. Sky Crane - how to land Curiosity on the surface of Mars 2011-11-29T04:15:21.007Z A little under a mile above the surface, the lander fell away from the back shell and parachute, triggering ignition of retrorockets on its underside. Sky Crane - how to land Curiosity on the surface of Mars 2011-11-29T04:15:21.007Z |
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