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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
  • 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
  • Micrometeorite collections: a review and their current status
    Here, we describe large and representative collections of micrometeorites currently available to the scientific community These include Antarctic collections from surface ice and snow, as well as glacial sediments from the eroded top of nunataks—summits outcropping from the icesheet—and moraines
  • 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
  • How To Find Micrometeorites On Your Roof - Science Friday
    A jazz musician-turned-micrometeorite hunter gives advice on how to search for the tiny bits of cosmic dust that could be covering your rooftop
  • 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
  • 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: Insights into the flux, sources and atmospheric entry . . .
    Micrometeorites (MMs) provide constraints on the flux and sources of extraterrestrial dust falling on Earth as well as recording the processes occurring during atmospheric entry
  • Micrometeorites - SpringerLink
    A micrometeorite is the remnant, on a planetary surface (e g , Earth), of an interplanetary submillimeter-size dust particle The arrival on Earth of microscopic extraterrestrial grains has been discussed since the late nineteenth century for example, with the discovery of cosmic spherules by the Challenger oceanographic mission in 1872





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