| 单词 | meteoroid |
| 例句 | We wandered over to the first area—Space Is Dangerous—and watched a video of a hole being blown through a thick metal plate by a simulated meteoroid. Sir Fig Newton and the Science of Persistence 2022-03-22T00:00:00Z Just like all those meteoroids that hit the moon! Shine! 2019-11-05T00:00:00Z I can clearly see the Man in the Moon surrounded by all those craters created eons ago by a bombardment of meteoroids. Shine! 2019-11-05T00:00:00Z It all depends on what layer of the atmosphere the meteoroid burns. Tonight’s spectacular new meteor shower can be seen and heard: Here’s how 2014-05-23T04:00:00Z The larger the meteoroid — and these are supposed to be large — the higher up they burn, the longer they cause ionization. Tonight’s spectacular new meteor shower can be seen and heard: Here’s how 2014-05-23T04:00:00Z But on other worlds, it’s more typical to find metamorphic rocks forged in the split-second shock of a meteoroid impact. Earth is a geological oddball in our solar system. This is why. 2023-10-12T04:00:00Z The meteoroid appeared so enormous they are sure they heard it roaring across the heavens. Anne Cusack Derk, Times photographer of skill and heart, has died 2023-10-06T04:00:00Z The compressed air starts to glow, and when it reaches a temperature of about 2,000 degrees Celsius, the solid material in the meteoroid starts to vaporize. The Science of Shooting Stars 2023-09-08T04:00:00Z In these streams, even the largest meteoroids—the technical term for the solid bits of rock—tend to be small, only about the size of a grain of sand. Perseid Meteor Shower Peaks This Weekend in a Stargazing Must-See 2023-08-11T04:00:00Z Meteors, or “shooting stars,” are the visible paths of meteoroids that fall into the Earth’s atmosphere at high velocities, according to NASA. What was that fireball blazing across the Southern California sky? 2023-06-26T04:00:00Z One temblor was caused by a marsquake — an earthquake on Mars, that is — while the other came from a large meteoroid impact. For the first time, scientists detect seismic waves rattling through Mars' core 2023-04-25T04:00:00Z As with most meteor showers, this one is produced by the dust sputtered off a comet, and is best seen in the early morning hours when the Earth runs headlong into the meteoroid stream. April night sky boasts bright emerging star, Mercury and a meteor shower 2023-04-11T04:00:00Z Most of that depends on the composition of the meteoroid itself: yellow comes from sodium, green from magnesium and blue-violet from calcium, all of which are common meteoroid ingredients. The Science of Shooting Stars 2023-09-08T04:00:00Z The air heats up so much that it glows and rapidly vaporizes the meteoroid about 90 to 100 km above the ground. Perseid Meteor Shower Peaks This Weekend in a Stargazing Must-See 2023-08-11T04:00:00Z Russian space officials said the earlier leak was caused by a tiny meteoroid that left a small hole in the exterior radiator and sent coolant spewing into space. Roscosmos: Russian spacecraft leak caused by external impact 2023-02-21T05:00:00Z Roscosmos said the investigation concluded that the damage was caused by a meteoroid strike. Russia to Launch Space Station Rescue Mission to Bring Astronauts Home 2023-01-11T05:00:00Z A meteor is what a meteoroid, a small piece of asteroid or a comet, becomes when it enters Earth’s atmosphere. Fireball Flashes Above Ontario and Parts of the U.S. 2022-11-19T05:00:00Z During that brief time, the meteoroid might travel dozens of kilometers horizontally through Earth’s atmosphere while also plummeting 10 or more kilometers. The Science of Shooting Stars 2023-09-08T04:00:00Z The meteoroids’ high speed means they zip across the sky in a second or so, sometimes even less. Perseid Meteor Shower Peaks This Weekend in a Stargazing Must-See 2023-08-11T04:00:00Z Mars has a feeble atmosphere, and when a meteoroid comes flying in from space, it’s unlikely to burn up before smacking into the surface. Big rocks slam into Mars, gouge craters, reveal subsurface features 2022-10-27T04:00:00Z A separate study last month linked a recent series of smaller Martian meteoroid impacts with smaller craters closer to InSight, using data from the same lander and orbiter. Two NASA spacecraft detect biggest meteor strikes at Mars 2022-10-27T04:00:00Z A meteoroid that survives its fiery descent and hits the ground is called a meteorite. Fireball Flashes Above Ontario and Parts of the U.S. 2022-11-19T05:00:00Z In reality almost all meteoroids are at most a millimeter in size—making them far too small to survive the fiery plunge to reach the surface. The Science of Shooting Stars 2023-09-08T04:00:00Z By comparison, the marsquakes generated by the meteoroid impacts registered no more than a magnitude 2. NASA Mars lander captures strikes by 4 incoming space rocks 2022-09-19T04:00:00Z The origin of the meteoroids is unknown, but they probably came from the asteroid belt between Mars and Jupiter, she said. Big rocks slam into Mars, gouge craters, reveal subsurface features 2022-10-27T04:00:00Z She remembered a large seismic event recorded by InSight around that time and with help from that team, matched the fresh hole to what was undoubtedly a meteoroid strike. Two NASA spacecraft detect biggest meteor strikes at Mars 2022-10-27T04:00:00Z Now, Loeb has a new provocative hypothesis, one that relates to a mysterious meteoroid that became known to Earth-dwellers several years before 'Oumuamua. Why one Harvard scientist believes alien technology may be sitting on the ocean floor 2022-08-31T04:00:00Z If a meteoroid is big, it can become dazzlingly bright during its brief atmospheric journey. The Science of Shooting Stars 2023-09-08T04:00:00Z The first confirmed meteoroid exploded into at least three pieces, each leaving its own crater. NASA Mars lander captures strikes by 4 incoming space rocks 2022-09-19T04:00:00Z Panspermia is the idea that life is distributed to different parts of the universe on objects such as meteoroids and asteroids. Biology for AP Courses 2022-06-09T00:00:00Z Scientists also learned the lander and orbiter teamed up for an earlier meteoroid strike, more than double the distance of the December one and slightly smaller. Two NASA spacecraft detect biggest meteor strikes at Mars 2022-10-27T04:00:00Z Random meteoroids of this nature strike Earth constantly: scientists estimate between 10 million and 1 billion kilograms of meteorites hit Earth every year, most of them tiny micrometeorites. Why one Harvard scientist believes alien technology may be sitting on the ocean floor 2022-08-31T04:00:00Z Later I did some basic math to ballpark its mass and figured its source meteoroid was likely about the size of a grapefruit! The Science of Shooting Stars 2023-09-08T04:00:00Z The InSight team expected to pick up numerous meteoroid strikes, given Mars’ proximity to the asteroid belt and the planet’s thin atmosphere, which tends to keep entering space rocks from burning up. NASA Mars lander captures strikes by 4 incoming space rocks 2022-09-19T04:00:00Z Bodies ranging from metres to hundreds of metres in diameter are classified as asteroids, and smaller bodies are referred to as meteoroids. Physical Geology 2015-01-01T00:00:00Z As Director of Interstellar Object Studies of the Galileo Project, I am leading an effort to discover gram-scale interstellar meteoroids in our atmosphere, using unclassified and transparent sensor networks. The Solar System's Oort Cloud May Harbor an Astonishing Number of Objects from Other Stars 2021-09-02T04:00:00Z A meteoroid is a "small particle" from an asteroid. Meteor blazes across South Florida skies 2021-04-13T04:00:00Z Although the vast majority of meteoroids are quite tiny, they add up: estimates vary, but general consensus holds that somewhere between 50 to 100 metric tons of cosmic junk hits Earth every day. The Science of Shooting Stars 2023-09-08T04:00:00Z And every so often, the asteroid ejected coin-size pebbles, probably propelled by meteoroid impacts or solar heating. A NASA mission is about to capture carbon-rich dust from a former water world 2020-10-08T04:00:00Z The experts also noted the 110 trillion pounds of meteoroids that impacted the Earth and moon were "approximately 30–60 times more than the Chicxulub impact." 62-mile space rock caused massive asteroid shower that hit Earth, moon 800M years ago, study says 2020-07-21T04:00:00Z A small chunk of an asteroid or comet is known as a meteoroid. Stadium-sized asteroid set to whiz past Earth, NASA says 2020-06-04T04:00:00Z Seismometers may be built to detect earthquakes, but their mechanical ears hear so much more: hurricanes thundering hundreds of miles away and meteoroids exploding in the skies on the other side of the planet. Coronavirus Turns Urban Life’s Roar to Whisper on World’s Seismographs 2020-04-08T04:00:00Z In rarer cases, if a meteoroid is truly large—roughly a meter or more in size—things change. The Science of Shooting Stars 2023-09-08T04:00:00Z The July 2017 event is known as a grazing fireball, a rare type of meteoroid that hits Earth’s atmosphere at a low angle, then skims like a skipping stone on a lake. This Fireball Ignored the Solar System’s One-Way Signs 2020-03-30T04:00:00Z Along with our cosmic neighbourhood’s eight planets, Murdin surveys dwarf planets Pluto and Ceres, and a selection of asteroids, meteoroids and satellites. Environmental racism, the world as it isn’t, and a guided tour of the planets: Books in brief 2019-07-30T04:00:00Z A small chunk of an asteroid or comet is also known as a meteoroid. NASA eyes giant ‘meteorite’ crater beneath Greenland’s ice 2019-02-12T05:00:00Z The provenance of the meteoroid remains an open question. During the Lunar Eclipse, Something Slammed Into the Moon 2019-01-23T05:00:00Z The meteoroid ruptures and falls apart into chunks, and then those can experience huge pressure and heating and crumble in turn. The Science of Shooting Stars 2023-09-08T04:00:00Z A meteor forms when a meteoroid, a type of space rock that breaks off from an asteroid — a rocky body orbiting the sun — enters Earth's atmosphere. Orionid meteor shower to light up night sky this weekend: Everything you need to know 2018-10-19T04:00:00Z Panspermia is the hypothesis that life on Earth originated from microorganisms in outer space that were carried here unintentionally by objects such as space dust, meteoroids and asteroids, according to an article on NASA's website. Comets and asteroids could be flinging life all over the galaxy, study finds 2018-10-18T04:00:00Z Those processes include bombardment by meteoroids and charged particles from Jupiter’s powerful radiation belts. Europa's Equator May Be Covered in Perilous Ice Towers 2018-10-08T04:00:00Z Impacts from tiny meteoroids are a permanent threat to the orbiting platform and it was built to withstand the constant bombardment from the dusty fragments that whizz about above the Earth. Astronauts tackle leak on space station 2018-08-30T04:00:00Z This happens in a cascading series until either the entire meteoroid is vaporized or the individual pieces slow enough that they no longer heat the air in front of them. The Science of Shooting Stars 2023-09-08T04:00:00Z A meteoroid is a small chunk of asteroid or comet. Science Says: That Michigan meteor could have been meatier 2018-01-17T05:00:00Z Bill Cooke with Nasa Meteoroid Environment Office told the Detroit News it was “definitely a meteoroid” and a rare sight for Michigan. Flash of light and loud bang in Michigan was meteor, experts say 2018-01-17T05:00:00Z Electronic signals indicated that Skylab’s heat shield, which protected the space laboratory from meteoroids and high temperatures, had been sheared off during liftoff. Paul Weitz, astronaut who helped repair Skylab and commanded space shuttle, dies at 85 2017-10-24T04:00:00Z Prolonged monitoring is the only way to catch unpredictable processes such as meteoroid impacts on Saturn's rings. Cassini at Saturn: A Retrospective 2017-09-13T04:00:00Z In the latter scenario, the meteoroid’s fragments will then simply free-fall to Earth in a “dark flight” period that can last several minutes, cooling them to frigid temperatures. The Science of Shooting Stars 2023-09-08T04:00:00Z They would certainly need a large mass to withstand the forces that might erode them over time, such as collisions from tiny meteoroids. Cassini hints at young age for Saturn's rings - BBC News 2017-08-30T04:00:00Z In 2013 a meteoroid of about 20m exploded in the atmosphere over the city of Chelyabinsk in central Russia with the kinetic energy of about 30 Hiroshima atom bombs. Close encounter: asteroid the size of a house set for near miss with Earth 2017-08-10T04:00:00Z When he looked down at Earth, he often saw shooting stars — small meteoroids — burning up in the atmosphere. By teaching computers to track asteroids, UW scientists may save the Earth 2017-06-29T04:00:00Z Using data from the Cameras for Allsky Meteor Surveillance, a network of about 60 cameras pointed at the sky above San Francisco Bay, researchers have recorded more than 300,000 meteoroid trajectories since 2010. Visualizing the Cosmic Streams That Spew Meteor Showers 2017-03-24T04:00:00Z Because they fall from such great heights, meteorites from a single large meteoroid can be strewn over a large area, making them hard to find. The Science of Shooting Stars 2023-09-08T04:00:00Z Casting a blinding fireball across the sky, the meteoroid shattered windows for miles, injured more than 1,000 people across 55 miles of the rock’s path. Earth woefully unprepared for surprise comet or asteroid, Nasa scientist warns 2016-12-13T05:00:00Z “The Chelyabinsk meteoroid was a piece of comet and they are usually made of icy material,” said Densing. Close encounter: asteroid the size of a house set for near miss with Earth 2017-08-10T04:00:00Z "Forecasters are predicting a Perseid outburst this year with double normal rates on the night of August 11-12," said Bill Cooke with Nasa's meteoroid environments office. Jupiter gravity push sets up 'meteor storm' on Earth - BBC News 2016-08-11T04:00:00Z The Moon’s tenuous atmosphere varies over each month and after meteoroid streams. How surface composition and meteoroid impacts mediate sodium and potassium in the lunar exosphere | Science 2016-01-14T05:00:00Z Although metal meteoroids are rarer than their rocky kin, meteorites that are mostly metal make up a larger share of the total that are found than you might expect. The Science of Shooting Stars 2023-09-08T04:00:00Z The meteoroid burned very rapidly and brightly across the sky, though it’s still unclear what caused the event. 'Great Pumpkin' Fireball Spotted Over Europe This Halloween 2015-11-02T05:00:00Z “Only the ongoing and harmless in-fall of meteoroids, tiny asteroids that burn up in the atmosphere.” ‘Spooky’: the 1,300ft-wide asteroid to hurtle close to Earth on Halloween 2015-10-23T04:00:00Z It then takes another 22 months for the meteoroid stream affected by Jupiter to arrive in the vicinity of the Earth. Perseid Meteor Shower Set to Peak on Wednesday and Thursday 2015-08-11T04:00:00Z The Moon’s tenuous atmosphere varies over each month and after meteoroid streams. How surface composition and meteoroid impacts mediate sodium and potassium in the lunar exosphere | Science 2016-01-14T05:00:00Z The marks were made by a meteoroid impact.” Uninhabitable zone : Nature : Nature Publishing Group 2015-08-11T04:00:00Z The space bodies she wants to tracks are asteroids and meteoroids. Falling Star 2015-07-17T04:00:00Z The meteoroid strike sprayed small rocks up to 30km from the initial impact site, said Professor Mark Robinson, from Arizona State University. 'Shrapnel' risk to Moon missions 2014-03-19T23:53:10Z Comets are composed chiefly of frozen gases, but the meteoroids that are mixed in with that gas — bits and pieces that have flaked off from the comet’s nucleus — are very flimsy. Perseid Meteor Shower Set to Peak on Wednesday and Thursday 2015-08-11T04:00:00Z Because it occurred in an era with modern consumer electronics, field sensors, and laboratory techniques, unprecedented measurements were made of the impact event and the meteoroid that caused it. [Research Article] Chelyabinsk Airburst, Damage Assessment, Meteorite Recovery, and Characterization 2013-12-04T22:55:59.769Z Fusion crust forms as the meteoroid is travelling through the atmosphere as a fireball. Meteorite pulled from Russian lake 2013-10-16T11:20:13Z In 1972, a meteoroid entered Earth’s atmosphere over Utah in the United States, traveled north and left the atmosphere over Alberta, Canada. Huge Meteorite Pulled From Russian Lake 2013-10-16T21:35:25Z As the Earth rotates, the side turning towards the Sun is able to catch more meteoroids, increasing the number of meteors in the sky. How to spot a shooting star this weekend 2013-08-10T16:15:05.070Z When a meteor is in space, it is known as a “meteoroid.” Shooting Star Science: Craters and Meteorites 2013-08-08T17:15:00.877Z Probably about a foot across and moving at some 56,000 miles per hour this meteoroid exploded with the energy of approximately 5 tons of TNT, not huge, but enough to pop like a flashbulb. The Moon has it all: Explosions, Water, and Clues to the Grand Tack 2013-05-22T17:15:02.917Z That would correspond to a meteoroid around 17 metres across and weighing 10,000 tonnes. Seven days: 15–21 February 2013 2013-02-20T18:20:23.670Z Though most meteoroids are tiny and invisible to the naked eye, burning up in Earth’s atmosphere before reaching the ground, experts closely monitor larger asteroids. Are You in an Asteroid Danger Zone? 2013-02-16T09:45:00Z Her calculations show that the meteoroid was approximately 15 meters across when it entered the atmosphere, and put its mass at around 40 tons. Russian Meteor Largest in Century 2013-02-15T18:15:00.347Z They're made when a meteoroid in space collides with a planet, moon or other astronomical body. Shooting Star Science: Craters and Meteorites 2013-08-08T17:15:00.877Z The tests included blasting a model structure with bullet-like projectiles to see how well it would withstand micro meteoroid and orbital debris hits. Balloon-like dwelling to be tested on International Space Station 2013-01-16T16:14:12Z After midnight the only meteoroids escaping collision are those ahead of the Earth and moving in the same direction with velocities exceeding 18.5 miles per second. Leonid Meteor Shower Peaks Before Dawn Saturday 2012-11-16T16:45:00.460Z A fraction of it bathes our planet, while some bounces off other planets, moons, comets and meteoroids. Mars rover gets instructions daily from NASA via a network of antennae 2012-10-29T21:27:07Z In addition to being relatively small in size, the rocky meteoroid was likely dark in color, making it even harder to spot against the backdrop of space. Russian Meteor Largest in Century 2013-02-15T18:15:00.347Z Furthermore, in work recently submitted to The Astronomical Journal, Wiegert, Brown and their colleagues predict that Earth will soon plow through this newfound meteoroid stream again. The Return of a Great 19th-Century Meteor Shower 2012-10-19T14:15:00.210Z Between being ejected from Mars and landing in Antarctica, the rock was just floating about in space as a meteoroid. Living Interplanetary Space Flight Experiment--or Why Were All the Strange Creatures on the Shuttle Endeavour ? 2011-06-01T13:15:00.290Z But before midnight, when we are on the backside, the only meteoroids we encounter are those with velocities high enough to overtake the Earth. Leonid Meteor Shower Peaks Before Dawn Saturday 2012-11-16T16:45:00.460Z A brief era of very intense bombardment by asteroids and meteoroids may have done the trick. JFK's 1961 Speech Launched Space Exploration to New Heights 2011-05-25T14:09:00Z The third paper looked at Mercury’s tenuous atmosphere, which consists of atoms knocked off the surface by sunlight, charged particles and dust-size meteoroids. NASA Mercury Messenger Finds Surprises 2010-07-19T21:41:00Z Still, Hughes worries that, because the Andromedid meteoroid stream's orbit extends toward Jupiter, that planet's gravity may have jostled the stream about, hindering accurate predictions for future showers. The Return of a Great 19th-Century Meteor Shower 2012-10-19T14:15:00.210Z The presence of ammonium suggests that the Tunguska object was most likely a comet, rather than asteroids or meteoroids, Melott says. Signs of Giant Comet Impacts Found in Cores 2010-03-31T17:24:00Z The outer shell of the ship was tough enough to stop medium-velocity meteoroids, and inside the shell was a self-sealing goo, like a tubeless tire. Last Resort These incongruities are attributed by Professor Newton to the irregular shape of the meteoroids producing unsymmetrical resistance from the air, and hence causing them to glance from their original direction on entering it. A Popular History of Astronomy During the Nineteenth Century Fourth Edition A convoy of robot deflectors and screens cleared the Extractor fleet's path of meteoroids, sand and rock swarms and space debris. The Universe — or Nothing When these particles, known as meteoroids, smash into the atmosphere, they generate streaks of light called meteors. The Return of a Great 19th-Century Meteor Shower 2012-10-19T14:15:00.210Z It is repeating the same thing to say that meteoroids follow in the train of the comets. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work The weight of this one meteoroid was too insignificant as compared with that of the Astronaut seriously to disturb my course. Across the Zodiac And it would seem as if in time this trailing material of the comet falls so far behind that it loses its grip, and is lost; hence the showers of meteoroids. Ragnarok : the Age of Fire and Gravel As the human meteoroid approached the sun or centre of attractive force, the attraction of one century squared itself to give the measure of attraction in the next. The Education of Henry Adams Early last December, however, an uncharted meteoroid stream pelted the planet with one of the year's strongest showers. The Return of a Great 19th-Century Meteor Shower 2012-10-19T14:15:00.210Z If the law of revolution held, we might still expect to find some of the trailing meteoroids of the comet not gone by on Fig. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work "There are certainly a number of uncertainties involved with trying to predict the meteoroid stream which is associated with a long-gone comet," Wiegert says. The Return of a Great 19th-Century Meteor Shower 2012-10-19T14:15:00.210Z Indeed, there is some evidence that the meteoroids are far enough apart to make the ring partially transparent. Recreations in Astronomy With Directions for Practical Experiments and Telescopic Work |
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