Sand- to boulder-sized particle of debris in the Solar System
"Meteor" redirects here. For other uses, see Meteor (disambiguation).
A meteoroid shown entering the atmosphere, causing a visible meteor and hitting the Earth's surface as a meteorite
A meteoroid (/ˈmiːtiərɔɪd/MEE-tee-ə-royd)[1] 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.[2] Objects smaller than meteoroids are classified as micrometeoroids or space dust.[2][3][4] Many are fragments from comets or asteroids, whereas others are collision impact debris ejected from bodies such as the Moon or Mars.[5][6][7]
A meteor or shooting star[8] is the visible passage of a meteoroid, comet, or asteroid entering Earth's atmosphere. At a speed typically in excess of 20 km/s (72,000 km/h; 45,000 mph), aerodynamic heating of that object produces a streak of light, both from the glowing object and the trail of glowing particles that it leaves in its wake. Meteors typically become visible when they are about 100 km (62 mi) above sea level. A series of many meteors appearing seconds or minutes apart and appearing to originate from the same fixed point in the sky is called a meteor shower.
An estimated 25 million meteoroids, micrometeoroids and other space debris enter Earth's atmosphere each day,[9] which results in an estimated 15,000 tonnes of that material entering the atmosphere each year.[10]
A meteorite is the remains of a meteoroid that has survived the ablation of its surface material during its passage through the atmosphere as a meteor and has impacted the ground.
^"meteoroid". Cambridge English Dictionary.
^ abCite error: The named reference Rubin2010 was invoked but never defined (see the help page).
^Atkinson, Nancy (2 June 2015). "What is the difference between asteroids and meteorites". Universe Today.
^"meteoroids". The Free Dictionary. Retrieved 1 August 2015.
^"Meteoroid". National Geographic. Archived from the original on 7 October 2015. Retrieved 24 August 2015.
^"Meteors & Meteorites". NASA. Archived from the original on 26 December 2003. Retrieved 1 August 2015.
^"Asteroid Fast Facts". NASA. 31 March 2014. Retrieved 1 August 2015.
^"Shooting Stars: Unveiling the Celestial Phenomenon". www.jameswebbdiscovery.com. Retrieved 2024-02-12.
^Lidz, Franz (2019-01-09). "The Oldest Material in the Smithsonian Institution Came From Outer Space". Smithsonian. Retrieved 2019-01-09.
^Gary, Stuart (2011-12-22). "Survey finds not all meteors the same". ABC Science. ABC.
A meteoroid (/ˈmiːtiərɔɪd/ MEE-tee-ə-royd) is a small rocky or metallic body in outer space. Meteoroids are distinguished as objects significantly smaller...
night sky. These meteors are caused by streams of cosmic debris called meteoroids entering Earth's atmosphere at extremely high speeds on parallel trajectories...
all day. The visible phenomenon due to the passage of an asteroid or meteoroid through the atmosphere is termed a meteor. If the object reaches the ground...
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...
found to be consistent with the expected distribution of debris from a meteoroid air burst. Later studies of the spheres found unusual ratios of numerous...
1767 meteoroid stream. Earth moves through meteoroid streams left from passages of a comet. The streams consist of solid particles, known as meteoroids, normally...
Explorer 46, (also Meteoroid Technology Satellite-A or MTS-A), was a NASA satellite launched as part of Explorer program. Explorer 46 was designed to...
creating a shock wave. The meteoroid then experiences what is known as ram pressure. As the air in front of the meteoroid is compressed its temperature...
planetary systems, though the most frequent involve asteroids, comets or meteoroids and have minimal effect. When large objects impact terrestrial planets...
by NASA B.G. Cour-Palais' reminisces of the Apollo meteoroid protection program The Skylab meteoroid shield design and development ESA Giotto dust shield...
A meteor air burst is a type of air burst in which a meteoroid explodes after entering a planetary body's atmosphere. This fate leads them to be called...
number of small Solar System bodies, such as asteroids, comets, centaurs, meteoroids, and interplanetary dust clouds. Some of these bodies are in the asteroid...
which are affected primarily by radiation pressure are known as "beta meteoroids". They are generally less than 1.4 × 10−12 g and are pushed outward from...
amount of material coming from the same meteorite fall: often a single meteoroid during atmospheric entry tends to fragment into more pieces. The table...
showers the visible rate is greatest in the pre-dawn hours, since more meteoroids are scooped up by the side of the Earth moving forward into the stream...
caused by iron meteoroids, which are most easily able to transit the atmosphere intact. Examples of craters caused by iron meteoroids include Barringer...
1972. It collected information on dust particles produced as a result of meteoroid impacts on the surface of the Moon. Instruments on Pioneer 8 and Pioneer...
infrared and ultraviolet observations of Jupiter, detect asteroids and meteoroids, determine the composition of charged particles, and to measure magnetic...
Meteorites (meteoroid debris) hit multiple places in Ernakulam district. Small fragments which are believed to be parts of the meteoroid were recovered...
energy resulting from either the impact of a meteoroid with a spacecraft or the explosive breakup of a meteoroid passing through the Earth's atmosphere. Coronal...
has no protection from meteoroids, and all of them collide with the surface as meteorites and create craters. Most meteoroids burn up as meteors before...
vibrations are due to internal seismic sources (moonquakes) and external (meteoroids and impacts from the spent S-IVB and LM ascent stages). The primary objective...
ballistic shield. Below 2,000 km (1,200 mi), pieces of debris are denser than meteoroids. Most are dust from solid rocket motors, surface erosion debris like paint...
February 19, 2011. "Meteoroid Detectors". NASA / National Space Science Data Center. Retrieved February 19, 2011. "Asteroid/Meteoroid Astronomy". NASA /...
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