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Chondrules in the chondrite classification Grassland. A millimeter scale is shown. Chondrules in the Carbonaceous Chondrite NWA 13887. A chondrule (from Ancient Greek χόνδρος chondros, grain) is a round grain found in a chondrite. Chondrules form as molten or partially molten droplets in space before being accreted to their parent asteroids.
Nebula is a video-on-demand streaming service provider. Launched by the Standard Broadcast content management agency in 2019 to complement its creators' other distribution channels (primarily YouTube ), [ 2 ] [ 3 ] the platform has since accumulated over 680,000 subscribers, [ 1 ] making it the largest creator-owned internet streaming platform.
While CM chondrules are smaller than average in diameter (~300 micrometer), CO chondrules are exceptionally small (~170 um). [ 31 ] [ 32 ] This may be a survivor bias : consider that the water which dissolves CM chondrules successfully eliminates those which are already small, while those which were large may remain to be observed, though with ...
EH (high-iron) chondrites contain small chondrules (~0.2 millimetres (0.0079 in)) and high ratios of siderophile elements to silicon. Somewhat more than 10% of the rock is composed of metal grains. A diagnostic feature of EH chondrites is that the Fe-Ni metal contains ~3 wt% elemental silicon.
Type 2 chondrites are those that have experienced extensive aqueous alteration, but still contain recognizable chondrules as well as primary, unaltered olivine and/or pyroxene. The fine-grained matrix is generally fully hydrated and minerals inside chondrules may show variable degrees of hydration.
Ionisation in the nebula is dominated by Sk 183, an extremely hot O3 main sequence star visible as the bright isolated star at the centre of the Hubble image. [11] A population of candidate brown dwarfs was found in NGC 602 in 2024. This was the first detection of brown dwarfs outside the Milky Way. [9]
LL chondrites contain the largest chondrules of the ordinary chondrite groups, averaging around 1 millimetre (0.039 in) diameter.. The LL group includes many of the most primitive ordinary chondrites, including the well-studied Semarkona (type 3.0) chondrite.
Nebulus is a platform game created by John M. Phillips and published by Hewson Consultants in the late 1980s for home computer systems. International releases and ports were known by various other names: Castelian, Kyorochan Land (キョロちゃんランド, Kyorochan Rando), Subline, and Tower Toppler.