Articles

Jason Davis

I'll be guest hosting this week's Cosmoquest Science Hangout on Wednesday, August 1. The show starts at 2300 UTC, and my special guest is Mihály Horányi.

Emily Lakdawalla

I know it’s been all Curiosity, all the time on this blog for the last couple of weeks, and that’s not likely to change much for the next couple of weeks. But I don’t want people to forget that there’s another rover exploring Mars’ ancient geology. Opportunity has been taking spectacular photos of Whim Creek and Endeavour Crater this last week.

Marc Rayman

Dawn has completed the final intensive phase of its exploration of Vesta, and it has now begun its gradual departure for Ceres.

Emily Lakdawalla

The June Solstice issue of our member magazine The Planetary Report is out! The feature article, by W. Scott Kardel of the International Dark-Sky Association, looks at the ecological, economic, and philosophical problem of light pollution. My inside-the-cover Snapshots from Space features image processing work by Gordan Ugarkovic. Bill Nye's Planetary Society Kids section shows you how to build your own MarsDial, and on its back page I share some weird and interesting facts about Mars' moons.

Emily Lakdawalla

Pluto is now known to have at least five moons (Charon, Nix, Hydra, P4, and the newly discovered P5), and its burgeoning population might pose a risk to New Horizons during its flyby, three years from now.

Marc Rayman

Once again Dawn is diligently mapping Vesta, circling the ancient protoplanet about twice a day, observing the signatures of Vesta's tortured history.

Emily Lakdawalla

As astronaut Don Pettit prepared for his return to Earth, he tweeted several beautiful shots from the Space Station.

A.J.S. Rayl

Even robots deserve a break once in a while, and when the Mars Odyssey orbiter went into safe mode in June, Opportunity got the chance to hang out and leisurely take in her surroundings at the Red Planet, while the Mars Exploration Rover (MER) mission downshifted into lower gear.

Alfred McEwen

Part two of a three-part series of images from the Mars Reconnaissance Orbiter’s HiRISE camera.

Mat Kaplan

Talk about changing climates on this world and others brought 600 people to the Boulder Theater.

Stuart Atkinson

Earlier today, unnoticed by the vast majority of the world, Opportunity reached and then silently passed a major milestone in her great adventure on Mars. At just before 3am, UK time, Opportunity began her 3000th sol, or martian day, on Mars.

Emily Lakdawalla

A newly published paper shows trans-Neptunian object Salacia to be unexpectedly large; it's somewhere around the tenth largest known thing beyond Neptune. It has a companion one-third its size, making it appear similar to Orcus and Vanth.

Bruce Betts

The Planetary Society Laser Bees project in Scotland is studying in the lab a potential new technique for deflecting dangerous asteroids: laser ablation.

Emily Lakdawalla

Just a pretty global view of one of Saturn's flock of icy moons, newly processed from archival data by Gordan Ugarkovic.

Mat Kaplan

Okay, just the ones we know about. xkcd does it again.

Alfred McEwen

Hundreds of images from the Mars Reconnaissance Orbiter’s HiRISE camera are publicly available, if you know where to look.

Bruce Betts

TPS Shoemaker NEO Grant Winner Gary Hug hunts near Earth objects from his back yard in Kansas. NPR's Morning Edition picked up on this fascinating story.

Emily Lakdawalla

I have a couple of updates on my post from yesterday: confirmation that Chang'E 2 is indeed gone from L2, and more specifics on encounter dates with Toutatis.

Emily Lakdawalla

An interesting set of images of Titan that Cassini took recently shows a peculiar cap at Titan's south pole.

Emily Lakdawalla

A reader comment on Jay Pasachoff's post last week about Venus transits viewed from other planets had me asking whether transits of other planets were also interesting to astronomers. Jay provided some answers!