- Jul 8, 2003
Astronaut spots rare and ethereal 'transient luminous event' from ISS
"Transient luminous event" sounds like a euphemism for a ghost, but it's actually a beautiful phenomenon that can sometimes be seen from the International Space Station. European Space Agency astronaut and current ISS resident Thomas Pesquet shared a view of an ethereal blue glow emerging over Europe.
Transient luminous events are caused by upper-atmospheric lightning. This one happened in early September and Pesquet tweeted about it this week, calling it "a very rare occurrence."