本帖最后由 positron 于 2010-3-6 19:01 编辑
BE ALERT FOR ZODIACAL LIGHT: If you live in the northern hemisphere, now is the time to look for the Zodiacal Light. It jumps up in the west after sunset, a luminous triangle that can amaze observers in dark rural areas. Rob Ratkowski sends this picture from atop the Haleakala volcano in Maui:
"We've had many visitors to our high observing site who have never seen the Zodiacal Light before and are surprised to see how bright it really is," says Ratkowski, who sometimes likens it to "light pollution."
The phenonenon is caused by sunlight shining on billions of tiny dust particles scattered throughout the plane of our solar system. The tilt of the sky favors evening sightings in the weeks of late winter and early spring--in other words, now! For best results, get away from city lights. Find a place with a clear western horizon. Let your eyes adapt to the darkness after sunset and prepare to be amazed.
漂亮的黄道光,不知什么时候能够亲自一见。此文谁译,奖励45MFB! |