achondrite वाक्य
उदाहरण वाक्य
मोबाइल
- On June 27, 1931, a meteorite of unusual achondrite type and green color impacted at Tataouine; about 12 kg of fragments were found.
- The authors define primitive achondrites as meteorites " " that exceeded their solidus temperature on the parent body " " and thus would partially melt.
- About 8 % of the meteorites that fall on Earth are achondrites ( meaning they do not contain chondrules ), some of which are similar to terrestrial igneous rocks.
- The infrared spectrum for 5261 Eureka is typical for an A-type asteroid, but the visual spectrum is consistent with an evolved form of achondrite called an angrite.
- The traditional way of subdividing meteorites ( see Meteorites classification ) is into irons, stony-irons, and two major groups of stony meteorites, chondrites and achondrites.
- The compositions of some meteorites ( achondrites ) show that differentiation also took place in some asteroids ( e . g . 26 Al was probably the main source of heat.
- Achondrites account for about 8 % of meteorites overall, and the majority ( about two thirds ) of them are HED meteorites, possibly originating from the crust of asteroid 4 Vesta.
- This, together with the low content of metal, led the 19th century mineralogist Tschermak to determine that they formed a transitional stage between chondrites and achondrites and to name them " amphoterites ".
- Spectroscopic observations through 2007 indicate that it has a large proportion of metal and achondrites on its surface ( either with or without a mesosiderite contribution ); which could also indicate that the surface regolith has undergone space weathering.
- The level of chromium isotope 54 Cr in �sterplana 065 is similar to those in ordinary chondrites, while oxygen isotopes are similar to those in some rare primitive achondrites . �sterplana 065 also features a chromium-spinel rutile assemblage, not observed in other meteorites.
- Stony meteorites are then traditionally divided into two other categories : chondrites ( groups of meteorites that have undergone little change since their parent bodies originally formed and are characterized by the presence of chondrules ), and achondrites ( groups of meteorites that have a complex origin involving asteroidal or planetary differentiation ).
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