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File:Properties of regolith on Eros.jpg

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English: Original description: On June 14, 2000, NEAR Shoemaker trained its camera on Eros' large, 5.3-kilometer (3.3-mile) diameter crater for a series of color pictures intended to measure the properties of regolith inside the asteroid's craters. In this false color view -- taken from an altitude of 50 kilometers (31 miles) -- redder hues represent rock and regolith that have been altered chemically by exposure to the solar wind and small impacts. Bluer hues represent fresher, less-altered rock and regolith, such as the bright patches that have been less affected by "space weathering." In that process, during micrometeorite impacts, rock reacts with miniscule amounts of trapped solar wind and is chemically changed. Interestingly, most of the large boulders have been just as affected as the regolith. This suggests either that the rocks are relatively old, or that they are "dirty" from an adhering film of regolith particles.
Italiano: Immagine in falsi colori, composizione di una serie di immagini raccolte dalla sonda Near Earth Asteroid Rendezvous (NEAR) il 14 giugno 2000 e che riprendono una porzione del cratere maggiore - di 5,3 km di diametro - presente sull'asteroide (433) Eros. Obiettivo delle osservazioni era evidenziare le proprietà della regolite nel cratere.
  • In tonalità del rosso, sono evidenziate le rocce e la regolite che è stata alterata chimicamente dall'esposizione al vento solare o da piccoli impatti;
  • In tonalità del blù, sono evidenziate sia le rocce e la regolite più fresche, che han subito un grado di alterazione minore, sie le porzioni luminosi del terreno che non hanno subito gli effetti dello "space weathering".
日期
來源 Planetary Photojournal - PIA02950
作者 NASA/JPL/JHUAPL

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Public domain 本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zhNASA版權政策JPL圖像使用政策
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