Sources of other specific meteorites remain unproven, although another set of eight achondrites are suspected to have come from Mars. |
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Based on their texture, stone meteorites are divided into two types, the chondrites and the achondrites. |
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From the crusts of differentiated asteroids and planets come the meteorites we call achondrites. |
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The shop offers a wide range of Lunar and Martian meteorites along with many rare achondrites and chondrites. |
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Meteorites contain platinum and meteorites have been landing on earth for billions of years already. |
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They are very similar in composition to the carbonaceous chondrite meteorites that sometimes fall on Earth. |
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When meteorites hit nearby worlds, they kick up bits of rock, some of which might have enough speed to escape from their planet entirely. |
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Small impactors deliver meteorites, while large ones infrequently wreak global devastation. |
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We have a major research program to investigate the thermal histories of lunar rocks, achondritic meteorites, and Martian meteorites. |
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It is brought to us by such solar system visitors as meteorites, which burn up or fragment and drift as fine particles through the atmosphere. |
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Chondrites are stony meteorites that contain small, melted beads known as chondrules and finer-grained material known as matrix. |
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Even strong iron meteorites, not just weaker stony meteorites, are affected. |
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Grouped with iron meteorites, these are pieces from the cores of fledgling planets destroyed by collisions when the Solar System formed. |
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The age of the carbonates can be clearly determined, and some very old ones had been found on certain asteroids and meteorites. |
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Silicon has also been detected in the Sun and stars and is found in certain types of meteorites known as aerolites. |
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On display are minerals, fossils, meteorites, and some rocks, most of which are of reference quality. |
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Most meteorites travelling towards earth burn up in the atmosphere, but it's estimated that on average, one does make it through each week. |
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Unique samples of moon rock and meteorites as old as the solar system landed on a Bickley girls' school. |
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More than ten minerals have been found in the Nantan meteorites with kamacite and taenite dominant. |
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This foil doesn't do very well in the air, but it protected it from meteorites and from the ultraviolet radiations from the sun. |
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This structure is very similar to kerogens found in carbonaceous meteorites. |
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It is the famous Pallassovo Zhelezo meteorite, which gave its name to the entire class of iron-stone meteorites known as pallasites. |
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Chondrites are made primarily of rock and so have a lower density than stony-iron meteorites, which contain some metal. |
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A record of the long term variations of the galactic cosmic ray flux can be extracted from Iron meteorites. |
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Its displays cover millions of specimens, including fossils, meteorites, mammals, plants, minerals, and insects. |
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The earth's crust is depleted in iridium and other platinum group elements, while meteorites are enriched in them. |
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The exception is a group of meteorites called howardites, eucrites, and diogenites. |
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Late-forming chondrules in meteorites are thus the last souvenirs of the process that formed our planetary system. |
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Thus, meteorites represent a fossil record of the early conditions of the solar nebula. |
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Other sources of high iridium concentrations are extraterrestrial objects, such as meteorites or comets. |
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That is how fragments of the asteroid belt can end up crashing into Earth as meteorites. |
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Other Moon rocks brought back by the Apollo astronauts have helped in understanding the lunar meteorites found on Earth. |
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It is not just in our minds that meteorites carry the threat of apocalypse or the promise of reawakened childhood wonder. |
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Information about meteorites, tektites, and impacts is now widely available on the internet. |
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I wanted to know more about meteorites and the clues to the deeper layers of our own planet offered by the bits that they carry from the core of shattered planetoids. |
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And it is just these entrails which are of interest because they heave up meteorites, fallen millennia ago, to their surface. |
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They were carried to blue ice areas near mountains where the ancient ice ablated and meteorites became concentrated on the surface. |
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It has been observed as an uncommon accessory mineral in some contact metamorphic deposits and is reported as a rare constituent of some carbonaceous chondrite meteorites. |
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This means there are a lot of different groups and sub-types of iron meteorite and they can be related to both stony achondritic and chondrite meteorites. |
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It is in the mesosphere that meteorites typically burn up as they enter the atmosphere. |
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Knifing through the darkness were thousands of extraterrestrial visitors, meteorites that blasted the Earth's dark surface. |
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There are only a few meteorites that don't burn up completely in the atmosphere and fall down to hit the ground. |
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Some rocks have basaltic compositions similar to the well-studied meteorites thought to have come from Mars, but other rocks are more like the volcanic rock andesite. |
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Such objects crash into the Earth's surface and are called meteorites when they are found. |
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One of the things astrobiologists are interested in is trying to understand the formation of organic molecules in space, in interstellar clouds and meteorites. |
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Lava flows extend for hundreds of kilometres across its surface. Both planets are pockmarked by craters caused by meteorites. |
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It has been identified in carbonaceous achondrite and iron meteorites. |
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Museums of natural history display the biggest meteorites, tallest dinosaurs, and millipedes with the most legs. |
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Crossing the blue ice on their ski-doos, the scientists, accompanied by their Japanese counterparts, started their hunt for meteorites. |
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In the 1930s and '50s he made estimates of the age of the universe from meteorites and from galactic and extragalactic statistics. |
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Stony meteorites, which are the most abundant kind of meteorite, are divided into two groups: chondrites and achondrites. |
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These minerals are common as green to yellow, glassy crystals in many mafic and ultramafic rocks and are also abundant in chondrite meteorites. |
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Some of these particles had compositions similar to that of carbonaceous chondrite meteorites, which may contain up to 20 percent water. |
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It belongs to a rare and particularly fragile class of meteorites known as carbonaceous chondrites. |
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Other areas of university research include meteorites, optoelectronics, engineering, robotics, nuclear power, and ceramics. |
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And scientists in Egypt never found an impact crater and a nearby lode of meteorites. |
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The Moon and the Earth have both been pummelled by meteorites during the past 5 billion years. |
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Compositionally, the asteroid's surface resembles the stony iron meteorites. |
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Glinting in semi-darkness at the Bruce, these jewels look like meteorites trailing fire. |
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Troilite, variety of the iron sulfide mineral pyrrhotite present in meteorites. |
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My research has largely been in the chemistry of how the particular components of chondrites, very primitive meteorites, actually formed in the solar nebula. |
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They had been in the the easternmost part of the Sør Rondanes hunting meteorites since the beginning of January. |
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A major focus of the researchers' work is Mars and its geology, landforms, and meteorites. |
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Fresh stony meteorites may have a whitish rock interior, with bright metal specks. |
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All the meteorites on display were found in the Atacama desert and you can even touch some of the 4½-billion-year-old rocks. |
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Regolith is a fine powder formed by a constant rain of small meteorites that breaks up the rocks at the surface. |
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It may have oceans today only because it was bombarded by comets and meteorites carrying payloads of ice. |
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This exhibition, with an impressive number of meteorites, focuses on the most famous meteor impact sites in Canada. |
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Meanwhile, the geologists have started to eyeing us as would-be competitors in the hunt for meteorites. |
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View images and descriptions to learn about meteorites in Canada and around the world. |
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In effect there was a consensus of the world's top scientists that meteorites did not exist. |
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However, most of the meteorites are burned up in the atmosphere and disappear. |
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It also plays the role of a shield that protects the earth surface from the collision with meteorites and solar debris. |
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Discover why they can result from earthquakes, landslides, volcanoes and meteorites. |
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Until then, we earthlings can continue to look for microscopic visitors, or their fossil remnants, that might reside in meteorites from Mars or from other worlds. |
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I expect she was trying to escape the Suffolk weather, which, when it's not bombarding us with thunderbolts and lightning, is chucking meteorites at us. |
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A majority of these meteorites comes from collisions in the asteroid belt between Mars and Jupiter. |
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Deceleration of meteorites begins high in the atmosphere where the surface of the incoming body heats up to incandescence causing melting and ablation. |
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Almost all meteorites are collisional fragments of asteroids, and can be dated radiometrically to about 4.6 billion years, which represents the birth of the Solar System. |
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One possible source of such untainted data are Earth's lunar meteorites. |
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Pallasites are the most common type of stony-irons but are rare meteorites, with probably less than one percent of all meteorites being pallasites. |
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Nickle-iron can be found in many stone meteorites in the form of small flakes or in irons and in stony-irons as large chunks or as the entire mass of the meteorite. |
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Carbonaceous chondrite meteorites fall on Earth from the asteroid belt. |
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For Petersen, meteorites are both solid scientific evidence and wondrous objects that have fallen from the heavens, carrying all sorts of resonances – from the scientific to the superstitious, the earthly to the supernatural. |
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A poetic visual meditation on meteorites, it explores the strange fascination they exert on the imagination, particularly to those that have witnessed them falling to Earth. |
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For the Hadean Eon, the only record comes from meteorites and lunar rocks. |
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The resulting lumps, which stand like a scatter of meteorites rained down from planet Krypton, are also the product of a generation of architects weened on the heady visions of Daniel Libeskind. |
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He also found troilite and another mineral, schreibersite, a phosphide of iron and nickel found in meteorites. |
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Asteroids and meteorites, along with comets, are regarded as left-overs from the raw ingredients of the early solar system, uncooked by any planet-forming processes. |
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Natural events considered in the analysis included flooding, high winds and tornadoes, earthquakes, lightning, cave-ins and landslides, meteorites and climate change. |
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Naively, one could think that the solar chemical composition is well known, at least for elements that leave a trace in solar spectrum or are enclosed in meteorites. |
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Popular ideas about when and where meteorites fall are connected to the observation of meteors, the brief streaks of light produced when high-speed, interplanetary particles enter Earth's upper atmosphere. |
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Following the same idea, it is possible to determine the astronomical origin of meteorites found on the ground, by comparing how they reflect the light of the Sun to the telescope observations of asteroids. |
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The central desert of Oman is an important source of meteorites for scientific analysis. |
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Knowing that the meteorites are undergoing extreme temperatures while entering the atmosphere, the rock has a particular texture, as of crystallized, which makes every dial really unique. |
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But when they analysed minerals called pyroxenes, they found that the ratio of iron to manganese did match those of other Martian meteorites. |
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About 100 times as many meteorites struck the Earth per year during the Ordovician compared with today. |
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Geologists tend to study plate tectonics, meteorites from outer space, and resources from the breakup of the supercontinent Gondwana. |
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Most of these meteorites have fallen onto the ice sheet in the last million years. |
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Oceanic impacts of large meteorites are expected to have high efficiency in converting energy into seismic waves. |
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A plagioclase glass in some chondrites and irons formed by preterrestrial impact between meteorites in space. |
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Much of the past work on isotopic composition of iron has focused on the nucleosynthesis of 60Fe through studies of meteorites and ore formation. |
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Although rare, iron meteorites are the main form of natural metallic iron on the Earth's surface. |
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It is a rare component of some meteorites and has scientific importance in solar nebula research. |
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Of the somewhat larger objects i.e., mostly asteroidal in origin the great majority that reach the ground as meteorites are too small to endanger human life or property on a significant scale. |
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He will go looking for meteorites in a horribly uncomfortable place. |
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This amount is lower than the expected value, suggesting that nucleosynthesis ceased in the solar system material about 2 × 108 years before the meteorites and planets solidified. |
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It includes rings, necklaces, earrings, bracelets and cuffing made of gemstones, meteorites, tektite and fossils, among others. |
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One theory is that tektites are solidified droplets of lunar material melted and splashed into space when large meteorites crashed into the moon. |
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The body of the book is divided into three parts, covering minerals, rocks from meteorites to tektites, and fossils. |
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Structurally more dense and solid compared to chondrites, iron meteorites are able to withstand the rigors of atmospheric entry with minimal effect and thus are better able to withstand the ravages of time. |
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To solve the problem, we need to study a lot more comets and meteorites. |
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Inclusions and chondrules formed independently of meteorites and were later incorporated into them. |
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Chondrites are the oldest, most primitive, least altered, meteorites. |
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Having suffered less exposure to space weather, minerals resulting from the re-surfacing will show spectra which are in better agreement with laboratory spectra of ordinary chondrite meteorites. |
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If meteorites are representative of this debris, the carbon could have been supplied in comparatively high concentrations as hydrocarbons, such as are found in the carbonaceous chondrite type of meteorites. |
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After having claimed responsibility for earthquakes, meteorites and eclipses, Gianni Motti appropriates the largest natural disaster, responsible for the destruction of the entire solar system. |
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In contrast, compositions of meteorites that originated from Mars include both basalts and ultramafic rocks such as dunite, clinopyroxenite, and iherzolite. |
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For example, the asteroid Vesta, whose surface appears to be basaltic rock, is the parent body of the meteorites known as basaltic achondrite HEDs, a grouping of the related howardite, eucrite, and diogenite meteorite types. |
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They are probably related to the basaltic achondrite group of stony meteorites, but they contain an unusually large quantity of interspersed metal. |
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Meteorite lakes, which are also known as crater lakes, are lakes created by catastrophic extraterrestrial impacts by either meteorites or asteroids. |
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This displacement of water is usually attributed to either earthquakes, landslides, volcanic eruptions, glacier calvings or more rarely by meteorites and nuclear tests. |
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New types of meteorites and rare meteorites have been found. |
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Recently discovered quasicrystals with five sided shapes have been produced in laboratories and have been found in meteorites from outer space, www. |
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This large collection of meteorites allows a better understanding of the abundance of meteorite types in the solar system and how meteorites relate to asteroids and comets. |
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Because meteorites in space absorb and record cosmic radiation, the time elapsed since the meteorite hit the Earth can be determined from laboratory studies. |
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The blasters are those beams of ravening destruction which take care of recalcitrant meteorites in a spaceship's course when the deflectors can't handle them. |
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Scientists also found telltale chemical fingerprints of pyroxene and olivine in and around the crater, two minerals that are commonly present in the Martian meteorites. |
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He thinks NWA 7325 could belong to a class of meteorites known as primitive achondrites, which contain chromium-rich pyroxene and are low in iron. |
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As such, iron is the most abundant element in the core of red giants, and is the most abundant metal in iron meteorites and in the dense metal cores of planets such as Earth. |
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Astronomers think most meteorites originate in the solar system's asteroid belt, with a mineral content reflecting that of their asteroidal parents. |
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When contacted by the GDN, the gem testing directorate said it was unable to test for tektites or meteorites and had no knowledge of any being found in Bahrain. |
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In meteorites it occurs with troilite and silicate minerals. |
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