FYI-- possible aurora this weekend!

A coronal mass ejection (CME) is heading for Earth following a strong
solar flare on May 13th.  Sky watchers should be alert for auroras when
the cloud arrives on May 14th or 15th.  The display, if it materializes,
will be best over high latitudes--e.g., Alaska and Canada.  But CMEs
sometimes spark auroras over lower latitudes, too, so everyone should
keep an eye on the sky this weekend.