Avtory i prava: Gruppa Marsianskii orbital'nyi lazernyi vysotomer , proekt Mars Global
Serveior , NASA
Greg Shira ( Nauchnaya studiya vizualizacii )
Poyasnenie:
Na kartinke pokazano udivitel'noe pervoe trehmernoe izobrazhenie severnogo polyusa Marsa, poluchennoe na osnove
vysotnyh izmerenii orbital'nogo lazera. V techenie vesny i leta 1998 goda Marsianskii
orbital'nyi lazernyi vysotomer posylal impul'sy lazernogo izlucheniya k poverhnosti Marsa s borta korablya Mars Global Serveior i zapisyval vremya prihoda obratno otrazhennogo
signala . S pomosh'yu dannyh o vremeni registracii otrazhennogo signala uchenye sostavili podrobnuyu topograficheskuyu
kartu okrestnostei severnogo polyusa Marsa . Karta pokazyvaet, chto diametr ledyanoi shapki raven 1200 km, maksimal'naya tolshina - 3 km, a
glubina kan'onov i vpadin - do 1 km. Eti izmereniya takzhe pokazali, chto shapka sostoit preimushestvenno iz vodyanogo
l'da, polnyi ob'em kotorogo sostavlyaet tol'ko 4 % ot l'da Antarktidy na Zemle. Eto kolichestvo vody sostavlyaet desyatuyu dolyu togo kolichestva,
kotoroe, po ocenkam uchenyh, sushestvovalo na Marse v proshlom . Kuda podevalas' vsya eta voda
?
Greg Shira ( Nauchnaya studiya vizualizacii )
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 2025 |
Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr' |
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 - ice - water - north pole - polar cap - Mars - Mars Global Serveior - led - severnyi polyus - polyarnaya shapka
Publikacii so slovami: Mars - ice - water - north pole - polar cap - Mars - Mars Global Serveior - led - severnyi polyus - polyarnaya shapka | |
Sm. takzhe:
Vse publikacii na tu zhe temu >> | |
