meteoroid


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Related to meteoroid: meteor shower, meteoroid stream

meteoroid:

see meteormeteor,
appearance of a small particle flying through space that interacts with the earth's upper atmosphere. While still outside the atmosphere, the particle is known as a meteoroid. Countless meteoroids of varying sizes are moving about the solar system at any time.
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meteoroid

(mee -tee-ŏ-roid) The collective term applied to meteoritic material in the Solar System, usually replaced by the terms micrometeorite for particles with mass less than 10–6 gram and meteorite for bodies with mass greater than about 105 grams. The majority of the mass of the meteoroid cloud around the Sun is made up of particles with individual masses between 10–7 and 10–3 gram. Meteoroids are usually produced by the decay of short-period comets and the collisional fragmentation of asteroids. In the main they move around the Sun in low-inclination direct orbits. The space density of meteoroids maximizes near the orbit of Mars and then falls off as 1/r 1.5, where r is the distance from the Sun. Individual meteoroids in the mass range 10–6 to 104 grams are fragile crumbly rocky dust particles with a composition similar to carbonaceous chondrite meteorites. See also meteor.

Meteoroid

 

a relatively small solid body that moves in outer space. The aggregate of meteoroids revolving around the sun forms the meteoric material in interplanetary space. Meteoroids are cometary debris or fragments of asteroids and in their motion occasionally encounter the earth and other planets.

meteoroid

[′med·ē·ə‚rȯid]
(astronomy)
Any solid object moving in interplanetary space that is smaller than a planet or asteroid but larger than a molecule.

meteoroid

any of the small celestial bodies that are thought to orbit the sun, possibly as the remains of comets. When they enter the earth's atmosphere, they become visible as meteors
References in periodicals archive ?
"But when the Moon passed through one of these meteoroid streams, enough vapor was ejected for us to detect it.
A meteor shower occurs when the Earth intersects a stream of meteoroids that has formed as a result of the disintegration of a larger body (usually a comet but occasionally an asteroid).
Meteoroids come from comets, and comets -- and other celestial objects like them -- are about the closest we'll ever get to the big bang.
If any part of the meteoroid survives burning up and hits the Earth, that remaining bit is then called a meteorite.
A meteor is the "light" of a meteoroid as it and the atmosphere heat up.
Meteor Shower--A regular (typically annual) event in which the orbit of Earth intersects that of a meteoroid stream, causing a number of meteors with approximately parallel trajectories appearing to emanate from the same radiant.
Very rarely does a piece of a large meteoroid survive to fall all the way to the ground.
The Apollo suit employed 21 of these superthin layers and replaced the reflective, aluminized silver thermal meteoroid top with nylon white as early as 1964.
According to NASA, fireballs occur when a small asteroid or meteoroid enters Earth's atmosphere and gets heated up due to the atmospheric friction.
The solid remains that the fall of a meteoroid leaves on the earth's surface are called meteorites and in the case of the former they respond to small remains of the dust tails of comets that usually travel through space in groups called swarms.
"But when the Moon passed through one of these meteoroid streams, enough vapour was ejected for us to detect it.
But both branches are so long-lasting--meaning the meteoroid streams are so wide--that they overlap greatly.