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 )
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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 | |
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