This view from NASA’s Cassini spacecraft features a blue planet, but unlike the view from July 19, 2013 (PIA17172) that featured our home planet, this blue orb is Uranus, imaged by Cassini for the first time.
Uranus is a pale blue in this natural color image because its visible atmosphere contains methane gas and few aerosols or clouds. Methane on Uranus — and its sapphire-colored sibling, Neptune — absorbs red wavelengths of incoming sunlight, but allows blue wavelengths to escape back into space, resulting in the predominantly bluish color seen here. Cassini imaging scientists combined red, green and blue spectral filter images to create a final image that represents what human eyes might see from the vantage point of the spacecraft.
Uranus has been brightened by a factor of 4.5 to make it more easily visible. The outer portion of Saturn’s A ring, seen at bottom right, has been brightened by a factor of two. The bright ring cutting across the image center is Saturn’s narrow F ring.
Uranus was approximately 28.6 astronomical units from Cassini and Saturn when this view was obtained. An astronomical unit is the average distance from Earth to the sun, equal to 93,000,000 miles (150,000,000 kilometers).
Among the interplay of Saturn’s shadow and rings, Mimas, which appears in the lower-right corner of the image, orbits Saturn as a set of the ever-intriguing spokes appear in the B ring (just to the right of center).
Scientists expect that spokes will soon cease to form as Saturn approaches northern equinox. The exact mechanism of spoke formation is still the subject of debate, but ring scientists do know that spokes no longer appear when the Sun is higher in Saturn’s sky. It is believed that this has to do with the ability of micron-sized ring grains to maintain an electrical charge and levitate above the rings, forming spokes. Thus, these may be some of the last spokes ever imaged by Cassini.
This view looks toward the unilluminated side of the rings from about 38 degrees below the ringplane. The image was taken in visible light with the Cassini spacecraft wide-angle camera on Oct. 22, 2013.
The view was obtained at a distance of approximately 1.6 million miles (2.6 million kilometers) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 146 degrees. Image scale is 93 miles (150 kilometers) per pixel.
Earth’s jet stream is a subject of intense interest and concern thanks to its effects on our weather. Saturn’s polar jet stream, seen here, causes no such worries for Earthlings, so we can simply marvel at its graceful form.
This view looks toward the north pole of Saturn from about 53 degrees above the ringplane. The image was taken with the Cassini spacecraft wide-angle camera on July 23, 2013 using a spectral filter sensitive to wavelengths of near-infrared light centered at 752 nanometers.
The view was obtained at a distance of approximately 590,000 miles (949,000 kilometers) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 52 degrees. Image scale is 35 miles (57 kilometers) per pixel.
The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA’s Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo.
The Cassini imaging team homepage is at:
LGF Pages author Shiplord Kirel had a post about this earlier, but I just have to do one too because this image created by the Cassini imaging laboratory (CICLOPS) is historic — as an instrument created by humans looks toward the Sun from the orbit of Saturn, with the giant planet eclipsing the Sun’s rays. That’s some truly impressive backlighting.
Click to enlarge, or click here to see the giant 9000x3500 pixel image.
For more details on this mind-blowing photograph, Phil Plait’s post is a must-read: Saturn: Incredible Mosaic of the Ringed Wonder.
See that tiny white dot at lower right of the planet, between the hazy outer ring and the first inner ring? That’s you.
The latest photos from NASA’s Cassini spacecraft orbiting Saturn are truly spectacular. This composite true-color image was created by an amateur image processor, Gordan Ugarkovic.
Click the image for a larger version, or go to the NASA page for a giant-sized 4000 x 3200 pixel image, suitable for a desktop background even if you have a ridiculously huge monitor: High Above Saturn | NASA.
Saturn’s north polar hexagon basks in the Sun’s light now that spring has come to the northern hemisphere. Many smaller storms dot the north polar region and Saturn’s signature rings, which appear to disappear on account of Saturn’s shadow, put in an appearance in the background.
The image was taken with the Cassini spacecraft’s wide-angle camera on Nov. 27, 2012 using a spectral filter sensitive to wavelengths of near-infrared light centered at 750 nanometers.
The view was acquired at a distance of approximately 403,000 miles (649,000 kilometers) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 21 degrees. Image scale is 22 miles (35 kilometers) per pixel.
Amazing new photos from NASA’s Cassini probe orbiting Saturn reveal a dizzying glimpse into a monster storm raging on the ringed planet’s north pole.
Cassini took the spectacular Saturn storm photos yesterday (Nov. 27) and relayed it back to Earth the same day, mission scientists said in a statement. The pictures reveal a swirling storm reminiscent of the recent Hurricane Sandy that recently plagued our own planet.
The tempest is located in a strange hexagonal cloud vortex at Saturn’s north pole that was first discovered by the Voyager spacecraft in the early 1980s, and sighted more closely by Cassini since then. The strange six-sided feature, which is nearly 15,000 miles (25,000 kilometers) across, is thought to be formed by the path of a jet stream flowing through the planet’s atmosphere.
“Cassini’s recent excursion into inclined orbits has given mission scientists a vertigo-inducing view of Saturn’s polar regions, and what to our wondering eyes has just appeared: roiling storm clouds and a swirling vortex at the center of Saturn’s famed northern polar hexagon,”
By Sander van den Berg
The footage in this video is derived from image sequences from NASA’s Cassini and Voyager missions. I downloaden a large amount of raw images to create the video.
The song is The Cinematic Orchestra -That Home (Instrumental).
(Used under a Creative Commons Non-Commercial Attribution Share Alike license.)