Articles

Alan Stern

Back in 2005 and 2006, when Pluto’s second and third moons (Nix and Hydra) were discovered, searches by astronomers for still more moons didn’t reveal any. So the accidental discovery of Pluto’s fourth moon by the Hubble Space Telescope in mid-2011 raised the possibility that the hazards in the Pluto system might be greater than previously anticipated.

Larry Crumpler

Opportunity has finally completed the detailed survey of the outcrops on the Cape York segment of the rim of the 22-km diameter Endeavour crater.

Emily Lakdawalla

Next week I'm traveling to speak at two events. Registration is still open for both, so I hope some of you can come. I also have some commentary on women being invited to speak at public events.

Emily Lakdawalla

Two weeks ago I wrote about Kiera Wilmot, a teen girl who was expelled from her school and charged with two felonies for unsupervised messing around with a chemical reaction on school grounds. Yesterday the Orlando Sentinel reported that no charges are being filed against her, which removes the greatest threat to her future.

Caleph Wilson

Caleph Wilson provides examples and guidance to scientists wishing to mentor students in science, technology, engineering, and math outreach programs.

Van Kane

An exciting new option to enhance NASA's OSIRIS-REx asteroid mission has been proposed by Steve Chesley at JPL. The ISIS spacecraft would impact asteroid Bennu to expose its interior structure to OSIRIS-REx.

Casey Dreier

NASA's leaked operating plan suggests that the agency is raiding money restored to the planetary program this year by Congress.

Emily Lakdawalla

I've been out of town for a couple of days and am overwhelmed with work and an overflowing email box. So what do I do about that? I ignore what I'm supposed to be doing and play with Cassini raw image data, of course. Here is a

Sarah Hörst

A tale from the scientific trenches: laboratory work to simulate Titan's rich atmosphere.

Jason Davis

A Soyuz capsule carrying Roman Romanenko, Chris Hadfield and Tom Marshburn landed safely in Kazhakstan after 146 days in space.

Bill Dunford

They look so similar they can be hard to tell apart, but each hides its own mysteries.

Jason Davis

Following an ammonia leak reported Thursday morning, NASA is planning a spacewalk to investigate a radiator on the P6 truss.

Emily Lakdawalla

China's lunar lander and rover are undergoing some of their last major tests and so are nearly ready for launch.

Emily Lakdawalla

You can watch via webcam as the next Deep Space Network radio antenna -- DSS 35, in Tidbinbilla, Australia -- gets its dish.

Mat Kaplan

Planetary Radio for the week of May 6 visits the Planetary Defense Conference one last time to join a

Emily Lakdawalla

Just messing around with a recently released processed version of the Deep Impact Hartley 2 data set.

Emily Lakdawalla

Please bear with me -- this blog entry has nothing to do with planets but a lot to do with society. For the last two days, my Twitter feed has been roiling with outrage about the story of Kiera Wilmot.

Emily Lakdawalla

New Horizons might see a Pluto with a northern polar cap, a southern polar cap, or both caps, according to work by Leslie Young.

Emily Lakdawalla

Note the special time! In this week's Planetary Society hangout at 5pm PDT / midnight UTC, I'll talk with MESSENGER deputy principal investigator Larry Nittler about what MESSENGER has accomplished in its prime and extended missions at Mercury, and what it stands to do if awarded a mission extension.

Marc Rayman

Marc Rayman's latest Dawn Journal explains why Dawn is currently closer to the Sun than both Ceres and Vesta.