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micrometeorite    
n. 微小陨石

微小陨石

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  • Micrometeorite - Wikipedia
    A micrometeorite is a micrometeoroid that has survived entry through the Earth's atmosphere Usually found on Earth's surface, micrometeorites differ from meteorites in that they are smaller in size, more abundant, and different in composition
  • Astronomy, Space Exploration Impacts - Britannica
    micrometeoroid, a small grain, generally less than a few hundred micrometres in size and composed of silicate minerals and glassy nodules but sometimes including sulfides, metals, other minerals, and carbonaceous material, in orbit around the Sun
  • City Stardust: Micrometeorites in Our Own Backyards
    Micrometeorites are tiny specks from outer space, part of an estimated 60 tons of cosmic dust that falls to Earth every day In space, they fly at speeds as fast as 72 kilometers per second (or 160,000 miles per hour) Micrometeorites land on Earth at a rate of about 30,000 tons per year
  • Micrometeoroids and Orbital Debris (MMOD) - NASA
    Millions of man-made debris and naturally occurring micrometeoroids orbit in and around Earth’s space environment at hypervelocity speeds averaging 10 km s (22,000 mph) This “space junk” collides with spacecraft and satellites potentially causing serious damage or catastrophic failure
  • How Do You Shield Astronauts and Satellites From Deadly Micrometeorites?
    A little micrometeorite, a small-but-incredibly-fast piece of space debris, says USA Today, “struck the arm of the satellite’s power-producing solar array, engineers say The jolt knocked the
  • Micrometeorites - Science Guy, Maine
    A micrometeorite (MM) is a microscopic object from space that falls to Earth and survives the trip through the atmosphere About 100 tons per day of micrometeorites hit our Earth, much more than all other meteorites and space debris put together
  • Thinking small: Uncovering the secrets of micrometeorites
    To find a meteorite that big is a rarity; but for this particular project, she needs something small: micrometeorites About 40,000 metric tons of extraterrestrial material rain down on planet
  • Micrometeorites - SpringerLink
    A micrometeorite is the remnant, on a planetary surface (e g , Earth), of an interplanetary submillimeter-size dust particle
  • Micrometeorites: Insights into the flux, sources and atmospheric entry . . .
    Micrometeorites (MMs) are extraterrestrial dust particles smaller than ~2 mm in diameter that survive atmospheric entry to be recovered from the surface of a planetary body (Genge et al , 2008)
  • How To Find Micrometeorites On Your Roof - Science Friday
    Every day, approximately 60 tons of dust from asteroids, comets, and other celestial bodies fall to the Earth These tiny metallic, alien stones of various shapes, textures, and colors—known as micrometeorites—are some of the oldest pieces of matter in the solar system





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