NASA explains how a 'ring of fire' annular solar eclipse occurs and how it differs from a total solar eclipse. WARNING: ...

A timelapse of the 2023 annular solar eclipse as seen from outside Great Basin National Park in Ely Nevada. Captured with a Unistellar eQuinox 2 smart telescope with Smart Solar Filter. Credit: Space.

First it shoots a vortex ring of air ... conductive aerosol out of seven mixtures tested. In practice, firefighters would aim the business end of a handheld cannon at a fire, and launch these ...