meteoroid

(redirected from Meteoroids)
Also found in: Dictionary, Thesaurus.

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.
..... Click the link for more information.
.

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 ?
If we need to learn more about meteoroids, shouldn't we get to them before they burn up?
It is estimated that on entry the meteoroid weighed about a ton.
The lines in the 'upper' and 'lower' components have significant differences, possibly indicating fragmentation or some variation in the meteoroid characteristics (Figure 4).
Cloudless skies permitting, the best viewing time will be the hours just before dawn on Monday and Tuesday, the head of US space agency National Aeronautics and Space Administration's meteoroid office, Bill Cooke, told Agence France-Presse.
The short-lived trail of light the burning meteoroid produces is called a meteor.
The new study suggests that some of the water-ice that may reside within permanently shadowed craters at the lunar poles could have come from within the moon rather than by delivery from comets and meteoroids.
If any part of the meteoroid survives burning up and hits the Earth, that remaining bit is then called a meteorite.
Depending on where you are and when you look, you could see as few as 20 or as many as 100 meteoroids per hour flash across the sky early Friday and into the weekend.
Earth's atmosphere is an effective but selective screen that prevents smaller meteoroids from hitting Earth's surface," states the researcher.
When the Earth's orbit passes near or intersects these cosmic highways of space debris, we identify their relationship to Earth as three unique bodies: meteoroids (me-te-or-oids), meteors (me-to-ors) and meteorites (me-te-or-ites).
Meteoroids that have come from the trail left by Halley's Comet produce this display.
Meteors are caused by bits of space debris, mostly the size of large sand grains or small pebbles, called meteoroids.

Full browser ?