Aurora Watch — Friday & Saturday

The SOHO spacecraft has detected a coronal mass ejection from sunspot 904 headed for the earth. This could trigger geomagnetic storms and aurora in the northern latitudes this Friday and Saturday nights. Look north around midnight for the reds and greens of the northern lights, and if you have a camera, take some long (10-to-60 second) exposures to capture otherwise invisible color. Check out Spaceweather for more info.