From: Andrew Johnson
Date: 2006-09-01 00:21:57
Inbox Astronomy – Hubble Captures a Rare Eclipse on Uranus August 31, 2006 Hubble Captures a Rare Eclipse on Uranus Get larger image formats Find the entire Hubble News archive, image galleries, and much more at hubblesite.org This NASA Hubble Space Telescope image is a never-before-seen astronomical alignment of a moon traversing the face of Uranus, and its accompanying shadow. The white dot near the center of Uranus blue-green disk is the icy moon Ariel. The 700-mile-diameter satellite is casting a shadow onto the cloud tops of Uranus. To an observer on Uranus, this would appear as a solar eclipse, where the moon briefly blocks out the Sun as its shadow races across Uranuss cloud tops. Though such “transits” by moons across the disks of their parents are commonplace for some other gas giant planets, such as Jupiter, the satellites of Uranus orbit the planet in such a way that they rarely cast shadows on the planet’s surface. Uranus is tilted so that its spin axis lies nearly in its orbital plane. The planet is essentially tipped over on its side. The moons of Uranus orbit the planet above the equator, so their paths align edge-on to the Sun only every 42 years. This color composite image was created from images at three wavelengths in near infrared light obtained with Hubbles Advanced Camera for Surveys on July 26, 2006. See the full release, including: More Images Fast Facts Related Links And more! This news release and its supporting materials are permanently archived at: hubblesite.org/news/… You are receiving this email because you are subscribed to the Inbox Astronomy mailing list, which sends notices in HTML whenever there is a new Hubble Space Telescope image, product, or news update. If you would like to unsubscribe or change your email preferences, please go to: hubblesite.org/newsc…