A NASA-funded sounding rocket for the GREECE mission launches into an aurora in the early morning of March 3, 2014, over Venetie, Alaska.
A NASA-funded sounding rocket launches into an aurora in the early morning of March 3, 2014, over Venetie, Alaska. The Ground-to-Rocket Electrodynamics – Electron Correlative Experiment, or GREECE, mission studies how certain structures – classic curls like swirls of cream in coffee — form in the aurora.Credit: NASA/Christopher Perry