Rambler's Top100Astronet    
  po tekstam   po klyuchevym slovam   v glossarii   po saitam   perevod   po katalogu
 

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.

<<  Avgust  >>
Pn Vt Sr Cht Pt Sb Vs
    1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31    
1995   1996   1997
1998   1999   2000
2001   2002   2003
2004   2005   2006
2007   2008   2009
2010   2011   2012
2013   2014   2015
2016   2017   2018
2019   2020   2021
2022   2023   2024
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.

English text
Po materialam Astronomy Picture Of the Day
Publikacii s klyuchevymi slovami: Mars - Mars
Publikacii so slovami: Mars - Mars
Sm. takzhe:
Vse publikacii na tu zhe temu >>

Ocenka: 2.7 [golosov: 21]
 
O reitinge
Versiya dlya pechati Raspechatat'

Astronet | Nauchnaya set' | GAISh MGU | Poisk po MGU | O proekte | Avtoram

Kommentarii, voprosy? Pishite: info@astronet.ru ili syuda

Rambler's Top100 Yandeks citirovaniya