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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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Publikacii s klyuchevymi slovami:
Mars - Mars
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