How Mars Lost its Atmosphere

(Starts With A Bang!) – Ethan Siegel:

In November of 2015, the MAVEN mission announced its first science results, and what we found was a tremendous confirmation of what we expected, along with some incredibly precise details:

  • Water was abundant and active on Mars for the first few hundred million years of the solar system, with oceans, rivers, rains and more.
  • However, at some point less than a billion years after Mars formed, its global magnetic field ceased to be, removing the planet’s main source of protection from the solar wind.

starts-with-a-bang f8fbfee7a92d

Solar Wind at Mars and Earth

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