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.
Micrometeorite, collected from the Antarctic snow, was a micrometeoroid before it entered the Earth's atmosphere
Lunar sample 61195 from Apollo 16 textured with "zap pits" from micrometeorite impacts
Electron micrograph image of an orbital debris hole made in the panel of the Solar Max satellite
The "energy flash" of a hypervelocity impact during a simulation of what happens when a piece of orbital debris hits a spacecraft in orbit
A meteoroid is a small rocky or metallic body in outer space.
Meteoroids are distinguished as objects significantly smaller than asteroids, ranging in size from grains to objects up to a meter wide. Objects smaller than meteoroids are classified as micrometeoroids or space dust. Many are fragments from comets or asteroids, whereas others are collision impact debris ejected from bodies such as the Moon or Mars.
Meteoroid embedded in aerogel; the meteoroid is 10 µm in diameter and its track is 1.5 mm long
2008 TC3 meteorite fragments found on February 28, 2009, in the Nubian Desert, Sudan
Meteor seen from the site of the Atacama Large Millimeter Array (ALMA)
A meteor of the Leonid meteor shower; the photograph shows the meteor, afterglow, and wake as distinct components
