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micrometeorite    
n. 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
  • 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
  • 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
  • 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
  • Micrometeoroid - Wikipedia
    A micrometeoroid is a tiny meteoroid: a small particle of rock in space, usually weighing less than a gram A micrometeorite is such a particle that survives passage through Earth's atmosphere and reaches Earth's surface The term "micrometeoroid" was officially deprecated by the IAU in 2017, as redundant to meteoroid [1]
  • 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
  • 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
  • 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





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