Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.armaghplanet.com/pdf/AstroTopics/Solar%20System/Earth%20and%20Mars.pdf Дата изменения: Tue Sep 20 18:49:57 2011 Дата индексирования: Tue Oct 2 01:29:17 2012 Кодировка: Поисковые слова: п п п п п п п п

A tale of two planets: the history of Earth and Mars compared

4.54 billion years ago 4.527 billion years ago 4.5-4 billion years ago

Earth Forms in Sun's proto-planetary disc Collision with other planet; Formation of the Moon Mainly carbon dioxide atmosphere, surface water, molten core and magnetic field

Mars Forms in Sun's proto-planetary dis c

4 billion years ago 3.8 billion years ago 3.5 billion years ago 3 billion years ago 2.4 billion years ago 670 million years ago 470 million years ago 16 million years ago 13 000 years ago Now Meteorite ALH84001 falls on Antarctica Thick, mainly nitrogen and oxygen atmosphere, extensive liquid water, molten core generating magnetic field First plant and animal life on land? First photosynthetic life? Atmosphere becoming rich in oxygen Earliest life in oceans?

Mainly carbon dioxide atmosphere, surface water, molten core and magnetic field Core cooling, magnetic field failing. Giant impact in northern hemisphere? Atmosphere thinning, planet becoming drier and colder

Some liquid water still present on Mars

Meteorite ALH84001 ejected from Mars into solar orbit

10 million years from now? 1.2 billion years from now? 6.4 billion years from now? 7 billion years from now? Sun heating, Earth's oceans boil Hot and airless Destroyed by expanding Sun

Thin, mainly carbon dioxide atmosphere, some water ice at poles and under surface, cool core, slight magnetic field Phobos destroyed by tidal stresses Mars warming As warm as Earth today Hot and airless cinder