Articles

Emily Lakdawalla

I've got some lovely pictures from Saturn to show you! Every three months, the Cassini mission dumps gigabytes worth of precious Saturn data into the Planetary Data System, and the latest gift came on April 1. This particular pile of data, which was taken between April 1 and June 30, 2010, contains a lot of really terrific moon observations.

Emily Lakdawalla

In a paper recently published in the Journal of Geophysical Research, Georgiana Kramer and several coauthors performed a careful comparison of two data sets that seem like they're measuring the same things, so you'd think that the measurements they took would match between the two instruments. But they don't quite match.

Emily Lakdawalla

Regular readers of this blog will find the content of today's 365 Days of Astronomy Podcast familiar, because it's an update on what the solar system exploration spacecraft are up to, based on my monthly

Emily Lakdawalla

I was astounded to learn this morning that SOHO can not only see Jupiter, it can actually resolve Jupiter's moons (at least its two outer ones) as points of light separate from their planet!

Emily Lakdawalla

Welcome, everyone, to the Planetary Society Blog for the 191st Carnival of Space! Every week, a different webmaster or blogger hosts the Carnival, showcasing articles written on the topic of space.

Emily Lakdawalla

Here's a photo worthy of hanging on the wall: a gorgeous, 4000-pixel-square portrait of the full Moon captured by Rolf Hempel from Germany on the night of the

Amir Alexander

Amir Alexander explains more about the FINDS Exo-Earths project and how it will help planet hunters detect distant Earths in the depths of space.

Emily Lakdawalla

Today the MESSENGER mission held a press briefing to show off some of the first images and other data that are streaming in from the spacecraft, now that it has entered Mercury orbit.

Emily Lakdawalla

This is MESSENGER's very first photo from Mercury orbit, a wide-angle view that reaches right to Mercury's south pole, exposing a very tiny sliver of territory not previously seen by spacecraft.

Mike Malaska

Some recent high-resolution images from the Lunar Reconnaissance Orbiter Camera (LROC) have revealed large blocks on the lunar surface that show evidence of layers. The layered blocks were seen near the crater Aristarchus, which is a bright crater in the northeast quadrant of the nearside Moon.

Emily Lakdawalla

Saturn's raging northern storm has been watched since it began by amateur astronomers, and now Cassini is getting in to the act too. Presumably once astronomers realized the magnitude of what was going on, some of Earth's great observatories were also occasionally pointed at the ringed planet to watch the storm grow.

Emily Lakdawalla

Today's Planetary Radio features Sean Solomon on the successful arrival of MESSENGER at Mercury. After checking that out, wander over to the 190th Carnival of Space, hosted this week by Paul Gilster over at Centauri Dreams.

Emily Lakdawalla

Since it's been several months since I last took a look at Jupiter, I thought it was time to see what's up with the South Equatorial Belt.

Emily Lakdawalla

Since Stardust is being decommissioned today I thought it'd be fitting to take a look back at one of its data sets. I hadn't fiddled with the Annefrank data set before, and it was small and easy to deal with.

Mike Malaska

Saturn's moon Hyperion has a bizarre sponge-like appearance that is in dramatic contrast to other heavily cratered bodies in the solar system.

Emily Lakdawalla

Last week, Zibi Turtle and Jason Perry and a dozen other coauthors published a paper in Science discussing evidence for rain on Titan.

Emily Lakdawalla

Today the Dawn imaging team released a photo from the main camera, the Framing Camera, symbolizing that they're preparing to start Dawn approach science; the other two science instruments, a spectrometer and a neutron detector, are also being turned on and checked out.

Emily Lakdawalla

As I wait for the MESSENGER Mercury Orbit Insertion webcast to start, I thought I'd fiddle with some images to point out that Mercury is a bridge between the scales of planets and the scales of moons.

Emily Lakdawalla

The day is finally here! In only five and a half hours, at 00:45 on March 18 (according to the spacecraft's clock), MESSENGER must ignite its main engine and run though a third of its fuel in only 15 minutes in order to enter its planned orbit around Mercury.

Ted Stryk

Here are Ted Stryk's notes from the sessions he attended in the afternoon of Thursday, March 10, at the 42nd Lunar and Planetary Science Conference.