Record of the Ancient Sun

We can also study the Sun by looking to the Moon. The Moon’s surface has been bathed in solar wind and cosmic rays throughout its history. Buried regolith, such as that trapped between lava flows, retains a historical record of solar wind fluxes. Collection of core tube samples to study these particles trapped in regolith layers will help us understand both regolith stratigraphy and the history of the solar wind and the implications this has on how the Sun has changed with time.

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