Poyasnenie: Chto eto za strannye obrazovaniya na Marse? Ottaivayushie peschanye dyuny. Kogda v severnom polusharii Marsa nastupaet vesna, peschanye dyuny okolo polyusa, pokazannye na fotografii, poluchennoi v konce maya orbital'nym apparatom EKA dlya issledovaniya malyh gazovyh sostavlyayushih v atmosfere EkzoMars, nachinayut ottaivat'. Uglekislota i vodyanoi led sublimiruyut v razrezhennoi atmosfere, srazu prevrashayas' v gaz. Bolee tonkie sloi l'da tayut pervymi i obnazhayut pesok, na etih bolee temnyh uchastkah solnechnyi svet uskoryaet tayanie. Pri etom dazhe mogut voznikat' peschanye geizery, proryvayushiesya skvoz' tonkii led. K letu pyatna rasshiryatsya i ohvatyat vse dyuny celikom. Severnyi polyus Marsa okruzhen mnozhestvom podobnyh polei s peschanymi barhanami. Ih strannye, rovnye dugi sozdany postoyannymi marsianskimi vetrami.

Sozdaite dalekoe nasledie: Poshlite vashe imya na Mars.

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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.

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