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 ?
The object itself, a piece of interplanetary debris (not to be confused with human-made space junk), is called a meteoroid.
Meteoroids come from comets, and comets -- and other celestial objects like them -- are about the closest we'll ever get to the big bang.
These amazing streaks of light you can sometimes see in the night sky are caused by tiny bits of dust and rock called meteoroids falling into the Ear th's atmosphere and burning up.
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).
Meteors are caused by bits of space debris, mostly the size of large sand grains or small pebbles, called meteoroids.
Once a meteoroid enters the atmosphere and burns up in the atmosphere, then it's a meteor.
But both branches are so long-lasting--meaning the meteoroid streams are so wide--that they overlap greatly.
Astronomer Bill Cooke from NASA's Meteoroid Environments Office said that, under perfect conditions, people could be treated to up to 200 meteors every hour.
Meteoroid (G) Meteorite (I) Meteor (R) BOX2: Ali G actor Sacha Baron Cohen (pictured) is married to which actress?
Based on the viewing angles from videos of the fireball, the researchers calculated that the meteoroid entered Earth's atmosphere at just over 19 kilometers per second, faster than had previously been reported.
Summary: TEHRAN (FNA)- A small object, possibly a meteoroid, has flown through a solar panel on the International Space Station (ISS), leaving a "bullet hole," Canadian astronaut and Expedition 35 commander Chris Hadfield said.
If any part of the meteoroid survives burning up and actually hits the Earth, that remaining bit is then called a meteorite.