Source: Lawrence Sromovsky, University of Wisconsin-Madison/W.W. Keck Observatory
Published: July 11, 2004
An infrared composite image of the two hemispheres of Uranus obtained with Keck Telescope adaptive optics. The component colors of blue, green, and red were obtained from images made at near infrared wavelengths of 1.26, 1.62, and 2.1 microns respectively. The images were obtained on July 11 and 12, 2004. The North pole is at 4 o’clock.
The two sides of the planet Uranus, as viewed in this composite image, by the Keck Telescope at near infrared wavelengths. These new images of the seventh planet from the sun promise to help scientists unravel the mysteries of the weather on Uranus.
Used with permission by: UW-Madison University Communications 608/262-0067
Photo by: courtesy Lawrence Sromovsky/UW-Madison Space Science and Engineering Center.
Date: 10/04 File#: scan provided
Link to source: solarsystem.nasa.gov
Solar system wonderment…!
Some sort of a heat wave warms the rings of Uranus, even though the planet orbits far away from the sun.
New heat images of the planet, obtained by two telescopes in Chile, reveal the temperature of the rings for the first time: minus 320 degrees Fahrenheit (minus 195 degrees Celsius), or the boiling temperature of liquid nitrogen.
While that sounds cold by Earthly standards, consider that most of space is much colder, approaching a temperature at which atoms stop moving. This point is called absolute zero, which is roughly minus 460 F (minus 273 C).
A composite image of the atmosphere and rings of Uranus seen in thermal emission.
The scientists who captured the new images said they aren’t sure what’s causing the relative warmth. But the weird temperature proves that the brightest and densest ring at Uranus (also known as the epsilon ring) is very different from other ring systems in our solar system.
This is way cool and rather shocking. At least to me. I would think the rings would be colder, but, like humanity, what do I know? Ha! Napundivricuala, that’s what!