sábado, 9 de abril de 2011

Video: Spring Fireballs


Video: Spring Fireballs


For reasons yet unknown, the rate of midnight fireballs increases during the weeks around the vernal equinox. It’s a beautiful display, but where do they come from? Last month, we reported on a network of fireball cameras that NASA is building, which is now tracking incoming fireballs — and just in time, too, for the fireball season. This video is part of a new series by NASA called ScienceCast, which will be a weekly feature highlighting a topic in NASA science news.