NASA astronaut Jack Fischer is riding on the International Space Station, 250 miles above Earth’s surface. On Sunday, a brilliant green aurora lit up the atmosphere that blankets our planet, and Fischer shared his view of the event on Twitter.

“People have asked me what a ‘burrito of awesomeness smothered in awesome sauce’ is,” he wrote. “Well folks, it looks like this … awesome sauce is green.”

Auroras — also called northern lights in the Northern Hemisphere — are caused by geomagnetic storms that occur when the sun blasts high-energy particles toward Earth. The solar particles interact with Earth’s upper atmosphere, and the result is colorful, shimmering lights.

The International Space Station travels at 17,500 mph through near-space. This video has been sped up.