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CI chondrites contain between 17 and 22 weight % water- more water than comet 67P/Churyumov–Gerasimenko. [102] [103] [104] Their high porosity (of up to 30%) seems to be correlated to those facts. The water is mostly tied up in water-bearing silicates.
Estimates for their contribution to the total meteorite population vary between 85.7% [2] and 86.2%. [3] Their study provides important clues for understanding the origin and age of the Solar System, the synthesis of organic compounds, the origin of life and the presence of water on Earth.
The matrix of CMs (ground material, between chondrules) has been described as "sponge" [36] or "spongy." [24] Grains of olivine and pyroxene silicates, too, are fewer in CM meteorites than COs, but more than CIs. As with chondrules, these are water-susceptible, and follow the water progression of the petrographic scale. So, too, do grains of ...
The Winchcombe meteorite is a rare and pristine carbonaceous chondrite, and it likely holds clues about early Earth's composition—and where our water came from.
Ashley King, a researcher in the planetary materials group at the Natural History Museum, said 12% of the sample was made up of water, and, as the least contaminated specimen to be collected, it ...
The coma is generally made of water and dust, with water making up to 90% of the volatiles that outflow from the nucleus when the comet is within 3 to 4 astronomical units (450,000,000 to 600,000,000 km; 280,000,000 to 370,000,000 mi) of the Sun. [50] The H 2 O parent molecule is destroyed primarily through photodissociation and to a much ...
Carbonaceous chondrites or C chondrites are a class of chondritic meteorites comprising at least 8 known groups and many ungrouped meteorites. They include some of the most primitive known meteorites. The C chondrites represent only a small proportion (4.6%) [1] of meteorite falls.
Few meteorites are large enough to create large impact craters. Instead, they typically arrive at the surface at their terminal velocity and, at most, create a small pit. NWA 859 iron meteorite showing effects of atmospheric ablation The impact pit made by a 61.9-gram Novato meteorite when it hit the roof of a house on 17 October 2012.