Space Weather Report
February 20, 2008
PACIFIC FIREBALL: On Tuesday morning, Feb. 19th, at approximately 5:30 a.m. Pacific time, people in Washington, Oregon, Idaho and Montana witnessed a spectacular fireball. It exploded not once but twice in midair, casting shadows and rivaling city lights. Many onlookers wondered if spy satellite USA 193 had been shot down. No, it was a small asteroid breaking up in Earth's atmosphere, a surprisingly common event. Reports of meteorites hitting the ground remain unconfirmed; stay tuned for updates.
TOTAL LUNAR ECLIPSE: On Wednesday evening, February 20th, the full Moon over Europe and the Americas will turn a delightful shade of red. It's a total lunar eclipse—the last one until Dec. 2010. When should you look? Click here for an animated timetable.
As explained in a recent Science@NASA story, red isn't the only color to look for when the Moon glides through Earth's shadow. Observers of several recent lunar eclipses have reported a flash of turquoise. For example, note the upper left corner of the above photo taken by Jens Hackmann during the European lunar eclipse of March 2007.
The source of the turquoise is ozone. Earth's ozone layer absorbs red sunlight while allowing blue rays to pass. This has the effect of turning Earth's shadow turquoise-blue around the edges. Look for it during the first and last minutes of totality (10:01 pm EST and 10:51 pm EST).
SOURCE: Space Weather
