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Stories, updates, insights, and original analysis from The Planetary Society.
Mars Exploration Rovers Update: Opportunity Turns 12! Embarks on Electric Slide
On January 24th, the veteran Mars Exploration Rover (MER) wrapped the last day of her 12th year of surface operations on Mars, marking an extraordinary, historic achievement for the Mars Exploration Rovers (MER) mission.
30th anniversary images of Uranian moons
January 24 was the 30th anniversary of the Voyager flyby of Uranus. Uranian moons have been on my mind ever since New Horizons sent us close-up images of Charon. On the occasion of the anniversary, Ted Stryk produced latest-and-greatest versions of the Voyager views of these worlds.
Dawn Journal: Measuring Light
Chief Engineer and Mission Director Marc Rayman explains some of the measurements the Dawn mission is taking at Ceres, most of which depend on sunlight.
Field Report From Mars: Sol 4270 - January 28, 2016
On January 23rd, Opportunity celebrated its 12th anniversary of landing on Mars.
Fun with a new data set: Chang'e 3 lander and Yutu rover camera data
Here, for the first time in a format easily accessible to the public, are hundreds and hundreds of science-quality images from the Chang'e 3 lander and Yutu rover.
Wide views of Mars from Mars Express
Geologist and amateur space image processor Justin Cowart has dug into the Mars Express archives and located some lovely, wide views across great swaths of the Martian globe.
Running Down a Comet
The Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) telescope has discovered its first comet of 2016.
China invites public on-board its robotic missions; and how to download Chang'e data
China plans a busy future in robotic space exploration. Besides the scientific merit, what interests me most about the upcoming Chang'e 4 mission is their intention to get the public involved.
Europa Budget Bulge
Van Kane explains how the key development for NASA’s mission to Europa will be an agreement on how the agency plans to accommodate the monetary bulge that will come from funding the mission.
NASA Could Choose Mars Human Landing Site during next Presidential Administration
The place NASA intends to the land the first humans on Mars could be selected during the next presidential administration, according to the agency’s planetary science division director, Jim Green.
xkcd: Possible Undiscovered Planets
Randall Munroe is a genius at disguising seriously educational infographics as funny jokes.
Theoretical evidence for an undiscovered super-Earth at the edge of our solar system
It's looking likelier that there is an undiscovered planet orbiting beyond the Kuiper belt. If it's there, it's roughly 10 times the mass of Earth (or about half the mass of Neptune), likely never gets closer to the Sun than about 100 AU, and takes more than 10,000 years to orbit the Sun.
Pretty Pictures of the Cosmos: Shadow Play
Adam Block brings us his first images processed in the new year, showcasing the beautiful interplay of light and dark.
Pretty pictures: Bittersweet goodies from Cassini at Titan, Enceladus, and Telesto
Tomorrow, Cassini will fly by Titan, picking up a gravity assist that will tilt its orbit slightly up and out of the ring plane. That will end what has been a wonderful year of frequent encounters with Saturnian moons.
Updates on China's lunar missions
It's official: China plans to send a lander mission to the lunar farside. A relay satellite will launch to the Earth-Moon L2 point in June of 2018, and a lander will follow at the end of 2018. The landing site may be within the south pole-Aitken basin.
JunoCam cruise data, and a look ahead to Jupiter
Juno is now fewer than six months and 100 million kilometers away from Jupiter, and the Juno team is busily preparing for the arrival. Amateur astronomers are supporting them by taking lots of Jupiter photos.
Mars Exploration Rovers Update: Opportunity Finishes Another Record Year, Approaches 12th Anniversary
Perched on the southern wall of Marathon Valley at Endeavour Crater, Opportunity braved temperatures descending well below -100° F in December to work the winter science campaign and home in on the remnants of ancient clays.
Curiosity update, sols 1166-1217: First reconnaissance of Bagnold dunes
In the six weeks since my last detailed Curiosity update, the rover has driven to, on, and around a couple of active barchan sand dunes on Mars. They are now searching for a site to scoop and sample sand on the western edge of Namib dune.
Capturing the Rhythm of Space: Insights from 47th DPS Meeting
The Division of Planetary Science (DPS) Meeting saw many exciting scientific discussions spanning the range of processes on different planetary bodies, as well as their replication in the laboratory and in models.
A Lander for NASA’s Europa Mission
While there’s at least eight years until it launches, this has been a pivotal year for developing NASA’s Europa mission.



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