Poyasnenie: Kakovo proishozhdenie chernyh pyaten na poverhnosti marsianskih dyun? S prihodom vesny v severnom polusharii Marsa nachinayut razmorazhivat'sya peschanye dyuny okolo polyusa. Bolee tonkie sloi l'da tayut pervymi i obnazhayut pesok, i na temnyh uchastkah pod deistviem solnechnogo sveta ottepel' proishodit intensivnee. K letu pyatna rasshiryatsya do razmerov otdel'nyh dyun, kotorye polnost'yu razmorozyatsya i potemneyut. Uglekislota i vodyanoi led sublimiruyut i prevrashayutsya v tonkoi atmosfere Marsa srazu v gaz. Na snimke, poluchennom v seredine iyulya, viden uchastok poverhnosti s pyatnistymi dyunami vozle severnogo polyusa Marsa razmerom primerno 3 km. V yuzhnom polusharii Marsa seichas, naoborot, zima. Samye surovye morozy nastupyat tam v seredine sentyabrya. Poslannym s Zemli na Mars avtomaticheskim marsohodam predstoit perezhit' etu surovuyu zimu.

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Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr'

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.

Publikacii s klyuchevymi slovami: Mars - sand - Mars - peschanye dyuny Publikacii so slovami: Mars - sand - Mars - peschanye dyuny
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