micrometeoroid

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Related to micrometeoroids: Micrometeorites

micrometeoroid

[¦mī·krō′mē·dē·ə‚rȯid]
(astronomy)
A very small meteoroid with diameter generally less than a millimeter.
References in periodicals archive ?
And for insulation, inside the spacesuit a liner divides the gas-bag from the thermal micrometeoroid garment--made with five layers of aluminized Mylar (silver party-balloon material).
Thermal Micrometeoroid Garment works like a thermos to protect astronauts from the sun's rays.
The moon lacks the shield provided by even a thin planetary atmosphere, such as Mars, so lunar explorers will have to withstand the relentless bombardment of harmful solar radiation and pelting rain of micrometeoroids.
Showalter says the matching orbits indicate that the ringlet formed when micrometeoroids bombarded Pan, chipping off small bits of it.
On satellites, aerogels might serve as a gentle mitt for catching speeding micrometeoroids without shattering these relics of the solar system's beginning into a useless powder.
Others have studied particles trapped in Earth's magnetic field or collected micrometeoroids and other debris from the solar system's younger days.
In a paper submitted to NATURE, he instead proposes that the dust in the bands may have been generated by micrometeoroids colliding with "unseen moonlets," each about 200 meters across, in belts some tens of kilometers wide, as well as by collisions between the moonlets themselves.