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Pyatnistye dyuny na Marse
<< Vchera 5.08.2007 Zavtra >>
Pyatnistye dyuny na Marse
Avtory i prava: Kosmicheskie nauchnye sistemy Malin, Marsianskaya orbital'naya kamera, Mars Global Serveior, Laboratoriya reaktivnogo dvizheniya, NASA
Perevod: D.Yu.Cvetkov
Poyasnenie: Pochemu na poverhnosti marsianskih dyun poyavilis' chernye pyatna? Kogda v 2004 godu v severnom polusharii Marsa nastupila vesna, peschanye dyuny okolo polyusa nachali ottaivat'. Bolee tonkie sloi l'da tayut pervymi i obnazhayut pesok, na etih bolee temnyh uchastkah solnechnyi svet uskoryaet tayanie. Pri etom mogut voznikat' peschanye geizery, proryvayushiesya skvoz' tonkii led. K letu pyatna rasshiryayutsya i ohvatyvayut celikom vse dyuny, kotorye polnost'yu ottaivayut i temneyut. Uglekislota i vodyanoi led v razrezhennoi atmosfere sublimiruyut, neposredstvenno prevrashayas' v gaz. Na etom snimke, poluchennom v seredine iyulya, viden uchastok pokrytyh pyatnami dyun razmerom okolo treh kilometrov okolo severnogo polyusa Marsa. V nastoyashee vremya budushee marsohodov Spirit i Opport'yuniti ostaetsya pod voprosom: pylevye buri prodolzhayut pogloshat' neobhodimyi im solnechnyi svet.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

English text
Po materialam Astronomy Picture Of the Day
Publikacii s klyuchevymi slovami: Mars - Mars
Publikacii so slovami: Mars - Mars
Sm. takzhe:
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