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A meteoroid (/ ˈ m iː t i ə r ɔɪ d / 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 1 m (3 ft 3 in) wide. [2] Objects smaller than meteoroids are classified as micrometeoroids or space dust.
Scientific research in meteoritics includes the collection, identification, and classification of meteorites and the analysis of samples taken from them in a laboratory. Typical analyses include investigation of the minerals that make up the meteorite, their relative locations, orientations, and chemical compositions; analysis of isotope ratios ...
The composition, size, and other properties depend on where the dust is found, and conversely, a compositional analysis of a dust particle can reveal much about the dust particle's origin. General diffuse interstellar medium dust, dust grains in dense clouds , planetary rings dust, and circumstellar dust , are each different in their ...
The in situ Micrometeoroid analyzer recorded impacts of meteoroids onto the sensitive detector surface and characterized their composition. The instruments delivered radial profiles of their measured data. Comet or meteoroid streams, and even interstellar dust were identified in the data.
Using artificial intelligence, scientists have discovered a crater from a meteoroid that they say shook material as deep as the Red Planet’s mantle: the layer between its crust and its core.
Current meteorite news articles; International Meteorite Collectors Association News and information about meteorite collecting and authentication ethics; Planetary Science Research Discoveries: meteorite articles and photographs; The British and Irish Meteorite Society; Types of extraterrestrial material available for study; The Natural ...
The Asteroid Meteoroid Detector (AMD) [32] on Pioneer 10 and Pioneer 11 used the optical detection and triangulation of individual meteoroids to get information on their sizes and trajectories. Unfortunately, the trigger threshold was set too low, and noise corrupted the data. [ 33 ]
These studies show that some meteorite classes are closely related to some asteroids. The HED meteorites for example are correlated with 4 Vesta. [2] Another, perhaps most useful way to classify meteorites by parent bodies is by grouping them according to composition, with types from each hypothetical parent body clustering on a graph. [3]