Solar Winds Stripped Martian Atmosphere Beginning 4.2 B. Yrs Ago
Posted 05 November 2015 - 06:11 PM
“Solar wind storms of a very active sun in the beginning of our solar system
began stripping the upper atmosphere of Mars away into space beginning 4.2 billion
years ago when Martian magnetic fields were lost for unknown reasons, while Earth's
strong magnetic fields have persisted and repelled the solar wind enough
to preserve the Earth's atmosphere.”
- Bruce Jakosky, Ph.D., Principal Investigator, NASA MAVEN Mission
NASA's MAVEN spacecraft launched in November 2013
and entered Martian orbit on September 22, 2014. Its mission has been
to study how Mars lost most of its atmosphere and water.
Artists' conception by NASA's Goddard Space Flight Center
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Illustration of Mars surrounded by strong solar storm wind that could
strip the Martian upper atmosphere beginning 4.2 to 3.7 billion years ago after Mars is
hypothesized to have lost its protective magnetic fields for unknown reasons. On the right,
Earth's strong magnetic fields still persist and deflect the solar wind. Illustrations by NASA
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Posted 17 November 2015 - 07:26 PM
Geologists theorize that the Earth's magnetosphere is created from the molten core. Maybe Mars did have a molten core at one time, but has cooled faster due to its smaller size. Then as it started losing its magnetosphere, the solar wind was allowed to bombard and shear off its atmosphere. Could be a logical hypothesis.