- Industry: Astronomy
- Number of terms: 6727
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Planetary Science Research Discoveries (PSRD) is an educational site sharing the latest research by NASA-sponsored scientists on meteorites, asteroids, planets, moons, and other materials in our Solar System. The website is supported by the Cosmochemistry Program of NASA's Science Mission ...
Avrupa Uzay Ajansı'nın ilk uzay aracı Mars, Haziran 2003'te yayına Mars Express. Yörünge, yedi uzaktan algılama araç ile gelen yeraltı su aramak için görev hedefleri vardır. Lander, Beagle 2, altı gün önce Mars Express Mars yörüngesine girdi orbiter serbest bırakıldı, ancak sinyal--dan o uzay aracı ve teleskoplar toprak tabanlı çeşitli iletişim tekrarlanan denemelerden rağmen alındı. Beagle 2 kayıp Şubat 2004 tarihinde ilan. Orbiter çalışır durumda ve 2014 devam etmesi bekleniyor. Mars Express Web sitesi.
Industry:Astronomy
Mekanik arıza ve kimyasal değiştirme kayalar ve mineraller, Dünya'nın yüzey sırasında hava, nem, pozlama ve organik madde.
Industry:Astronomy
Iron meteorites are made, almost completely, of iron and nickel metal. They are chemically distinguished and grouped according to the abundances of the trace elements such as gallium and germanium, as well as nickel. Initially, irons were classified into four groups and were given Roman numerals I, II, III, and IV. Today twelve groups are recognized and designated further by letters A through F according to concentrations of siderophile ("iron-loving") trace elements. Iron meteorites that do not fit into the groups are called ungrouped. The two iron-nickel alloys in iron meteorites are called kamacite (low-nickel content, usually up to 7. 5 wt% nickel) and taenite (high-nickel content, ~20 to 50 wt% nickel). These alloys are rare in terrestrial rocks. (See also Widmanstätten Pattern. )
Industry:Astronomy
Dünya'ya da başka bir gezegen, o su, sıvı su, buz ve su buharı yüzeyinde, yer altında veya atmosferde gibi bölümüdür.
Industry:Astronomy
Patlayıcı patlama lav üreten ve sıcak kaya ve lav parçaları çıkarma.
Industry:Astronomy
Dünya-Güneş uzaklığı, 149 için eşit. 5 milyon kilometre veya 93 milyon mil.
Industry:Astronomy
An iron-oxide mineral (Fe<sub>2</sub>O<sub>3</sub>) that may be the cause of the red color on Mars. Courser-grained gray hematite has the same chemical formula as the red variety, but a different crystalline structure. The deposits of gray hematite found in the Terra Meridiani region of Mars may suggest that water once circulated through the region's rock layers.
Industry:Astronomy
