It’s been over two months since the MESSENGER spacecraft successfully entered orbit around Mercury, back on March 18, and it’s been enthusiastically returning image after image of our solar system’s innermost planet at a unprecedented rate. Which, of course, is just fine with me! The image above shows Mercury’s southern hemisphere and the bright rays…
Author: Jason Major
Watching Over Spirit
As a poignant reminder that Spirit is now officially at rest in its permanent position next to Home Plate, the HiRISE team released this image today showing the sun glinting brightly off the rover’s solar panels, visible to the Mars Reconnaissance Orbiter high above. Even though it may have fallen silent, Spirit will always be…
The Sun Sets on Spirit
After seven years on Mars it is now time to say good night to the rover named Spirit. Since becoming irreparably stuck in the soft Martian soil near a low rise dubbed “Home Plate” nearly two years ago, Spirit has weathered a frigid Martian winter that may have damaged its electronics. Attempts to communicate with…
A Fistful of Moons
This image from Cassini shows no less than five of Saturn’s moons in the same frame: Rhea (1,528 kilometers, or 949 miles across) is largest in the foreground; Dione (1,123 kilometers, or 698 miles across) can be seen just above the rings below Rhea near the center; Prometheus (86 kilometers, or 53 miles across) is just barely…
Grimsvotn GOES Boom
Watch as a huge cloud of ash bursts into the upper atmosphere from Iceland’s Grímsvötn volcano in this sequence of images taken by NASA’s GOES-13 weather observation satellite. The oblique angle of illumination and position along the edge of the globe emphasizes the incredible vertical scale of the eruption. (Click to play.) Grímsvötn erupted on…
Up, Up and Away!
The space shuttle Endeavour lifted off from Cape Canaveral for the final time on the morning of Monday, May 16 2011, and quickly pierced through the low cloud cover, disappearing from view for many observers on the ground but not for those high above in a NASA weather reconnaissance aircraft! They had quite the view…
Three Weeks on Jupiter
Can’t see the video below? Click here. Check out this fascinating new-and-improved video of Jupiter’s swirling cloud belts in action, made up of Voyager 1 image data acquired from January 6 through January 29, 1979. Digital artist Björn Jónsson assembled this high-definition animation from 58 images skillfully color-composited and tweened together to create a smooth video….
A Fan of Shadows
Cassini captured this visible-light image on October 16, 2010, showing a thick clump of icy material in Saturn’s bright F ring casting a “fan” of thin shadows. Clumps like this have been seen many times before and may be caused by the gravitational effects of passing shepherd moons like Prometheus or as-of-yet undiscovered moonlets within the ropy…
From the LITD Archives: A Primordial Moon
A beautiful Cassini color-composite by Gordan Ugarkovic, this false-color image shows the ancient and heavily-cratered surface of Saturn’s moon Phoebe. Irregularly-shaped and bout 132 miles across, Phoebe is a fifteenth the size of our own moon but is believed to be much, much older. With its retrograde (backwards) orbit, high orbital incline and extremely dark,…
A First Look at an Asteroid
Ever wonder what an asteroid would look like from three-quarters of a million miles away? Well, here ya go. 🙂 This image, a processed version of the original, shows the true size of the 330-mile-wide asteroid Vesta as seen by the approaching Dawn spacecraft on May 3, 2011. The original image contained a lot of…
Mars’ Underground Atmosphere
Scientists have spotted an underground reservoir near Mars’ south pole the size of Lake Superior… except that this lake is filled with frozen carbon dioxide – a.k.a. “dry ice”! A recent report by scientists at the Southwest Research Institute in Boulder, CO reveals variations in Mars’ axial tilt can change how much carbon dioxide gets…
Cool Cassini Capture: Pandora
Cassini took this raw image of the 50-mile (81-km) -wide moon Pandora on May 7, 2011. The oval-shaped shepherd moon orbits Saturn just outside the F ring. Saturn’s long shadow is cast over the central portion of the rings in this image. Credit: NASA / JPL / Space Science Institute