A microscopic particle in space or of extraterrestrial origin that is small enough so that if it enters the earth’s atmosphere, it will not burn up but drift to the earth’s surface instead.
More example sentences
- Hazardous micrometeoroids and radiation also threaten spacewalkers, and with no atmosphere and therefore no atmospheric pressure, fluids in the human body would boil.
- If a micrometeoroid or piece of space debris penetrates the tank, the dregs can ignite, causing an explosion that shatters the rocket body and creates a cloud of debris.
- He or she points out that the shuttle would be less exposed to micrometeoroids and orbital debris at the altitude of Hubble than at the lower altitude of the space station.
Definition of micrometeoroid in:
- The British & World English dictionary