Released today, this image shows one of many small (half-mile wide) moons that orbit Saturn within the rings themselves, creating a “propellers” of gravitationally-tugged ring particles on either side of it. The Cassini team has been watching these interesting ring features for some time, and has carefully tracked eleven of the larger ones over the…
Daphnis Close-up
On July 5 the Cassini spacecraft took this image of Daphnis, a 4.5-mile-wide shepherd moon that orbits Saturn within the Keeler Gap. It’s the closest image yet of Daphnis, a moon that’s famous for the scallop-edged gravitational wake it makes on the edges of the gap as it passes. Read more on the Cassini mission…
Color Me Saturn
A somewhat truish colorized image of Saturn’s southern hemisphere, taken by Cassini on June 26, 2010 from a distance of 1,354,284 miles (that’s over five times the distance from Earth to the moon!) I substituted Cassini’s infrared and ultraviolet raw image channels for red and blue, respectively, and adjusted the combined results (with a native…
Solar Maelstrom
A powerful sunspot creates a spinning whirlpool of magnetic activity around itself in this detail from an SDO image (AIA 304) taken today, June 24. Sunspots are darker areas on the sun’s surface (photosphere) where a “bubble” of magnetic fields have risen from the interior and “pushed aside” the hotter layers at the surface to…
This Week in Space
Season 1, episode 23: SpaceX issues a financial challenge to the big space contractors, last shuttle launches slip, video diary from Mars 500 crew, IKAROS’ successful solar sail, kids discover Martian cave, John Glenn joins the save shuttle fray, Cassini takes a dip in Titan’s atmosphere, new Hubble images show star formation, extreme exoplanet weather,…
Over The Edge
I was just checking out this HiRISE image from the Mars Reconnaissance Orbiter (MRO) and thought I’d tweak it and share it here…it’s a rare and very nice in-action shot of fine ice and dust particles streaming over the edge of a sheer 2,300-foot-high cliff in the north polar region of Mars. Billowing clouds of…
A Picture of Home
The Lunar Reconnaissance Orbiter turned its cameras toward home from a distance of over 231,000 miles away on June 12, 2010. Looking back at Earth in this way helps to calibrate its Wide Angle Camera, and while doing so two images were taken with its Narrow Angle Camera and combined to create this beautiful black-and-white…
As The Day Is Long
Happy Summer Solstice! A this is the day that the Earth’s northern hemisphere receives the longest amount of sunlight during the course of the year, I thought it only appropriate to feature a pic of the Sun! Above is a detail from a high-resolution image taken today by the Solar Dynamics Observatory showing some very…
You Are Here
Here’s an image that always blows my mind: it’s our planet as seen by the exploration rover Spirit on March 8, 2004, 63 Martian days into its mission. It’s the first image of Earth taken from the surface of another planet. The official description says: The image is a mosaic of images taken by the…
This Week in Space
Season 1, episode 22: Miles is back this week with a new way to track world shipping, Soyuz launch to ISS, former NASA admin Griffin has kind words about SpaceX’s Elon Musk, the results are in from Kepler’s first days of planet hunting, men locked up for 17 months to simulate Mars mission and a…
Coronal Loops
Seen in extreme ultraviolet wavelengths, bright coronal loops erupt from the edges of a sunspot in this image, a detail of a larger image captured by the SDO spacecraft earlier today. (Click to see the full-sized version.) Coronal loops are plasma-filled “tubes” that arc upwards from the Sun’s surface and reconnect at both ends. They…
VLT: A Space Opera
Here’s an enchanting video by the European Southern Observatory highlighting the discoveries of their Very Large Telescope (VLT) array, high in the mountains of the Atacama Desert in Chile. The Atacama is the driest place on Earth, far from the light pollution of major cities, and thus provides the clearest, darkest skies allowing these massive…
Lights in the Dark 