Articles

A.J.S. Rayl

Since leaving the plains of Meridiani, pulling up to Endeavour Crater and checking out its first rock last month, Mars Exploration Rover Opportunity has wasted no time in getting the

Emily Lakdawalla

Without a doubt the most exciting events in space in October are Cassini's two, count them, two extremely close flybys of Enceladus, spaced only eighteen days apart, on October 1 and 19 (and followed by a third one on November 6).

Marc Rayman

Dawn's fourth anniversary of being in space is very different from its previous ones. Indeed, those days all were devoted to reaching the distant destination the ship is now exploring. Celebrating its anniversary of leaving Earth, Dawn is in orbit around a kindred terrestrial-type world, the ancient protoplanet Vesta.

Emily Lakdawalla

Since Cassini currently orbits Saturn within the plane of Saturn's rings, it has lots of chances to catch two or more moons in the same photo. One such

Emily Lakdawalla

This image has been making the rounds of Google+ and Facebook today.

Emily Lakdawalla

The world watched on Friday as the derelict spacecraft named UARS made its final few orbits around Earth. And then we waited for final word of its reentry location. And waited. And waited.

Emily Lakdawalla

A new Mars mission, MAVEN, has finally leapt the hurdle separating its existence as an idea from its material existence. Here's MAVEN's baby picture: the just-completed

Emily Lakdawalla

If you are reading this and happen to recall an entry that struck you as particularly educational or having a particularly beautiful picture or whatever, I'd very much appreciate it if you could note that in the comments (or by email or Twitter, if you prefer).

Ted Stryk

Ted Stryk reminisces on how he was turned on to astronomy.

Emily Lakdawalla

In a now-routine act of obtaining detailed photographs of robots from Earth sitting on the surface of another planet, the HiRISE camera on Mars Reconnaissance Orbiter has captured a view of Opportunity sitting on the rim of Endeavour crater.

Emily Lakdawalla

About four years ago I wrote a blog entry about an ESA press release about paper published in Nature that suggested that Saturn's moons Tethys and Dione might have volcanic activity, like Enceladus. A new paper published in Icarus casts doubt on that conclusion.

Jason Davis

Meet the next big thing in NASA's mission to study planet Earth: NPP, the NPOESS Preparatory Project satellite.

Emily Lakdawalla

All of us at the Planetary Society are deeply saddened by the passing of planetary scientist Michael Drake. He has been a pillar of the planetary science community for four decades.

Emily Lakdawalla

Unless you've been living under a rock you've probably heard that a very large Earth-orbiting satellite is going to be reentering Earth's atmosphere soon, and there's a small but nonzero chance of debris coming down where somebody might actually find it.

Emily Lakdawalla

When Hayabusa's sample return capsule was first opened and found to be very clean-looking inside, I doubted that there could be enough material for laboratory analysis. JAXA announced later that they scraped about 1500 dust grains from the inside with a teflon spatula, and these likely came from Itokawa.

Emily Lakdawalla

This amazing video has already been posted by basically every other space blogger but I can't resist featuring it too, especially because I just realized that it was not made by NASA but instead by a member of the public digging into public NASA archives of image data -- yay for amateurs!

Louis D. Friedman

I spent much of the past week attending the Caltech Space Challenge, a student-organized international competition to design a human mission to a Near-Earth asteroid. It was a great week, and one of the most positive, upbeat and hopeful programs I have participated in concerning the future of space exploration.

Charlene Anderson

In this latest skirmish over NASA's budget, the numbers are in -- and it looks like we won!

Emily Lakdawalla

The Dawn team released today a nice little video that flies around a shape model of Vesta produced by DLR, the German Aerospace Corporation, who built and operate Dawn's camera.

Emily Lakdawalla

I'm preparing a talk for the Pacific Astronomy and Telescope Show here in Pasadena on Sunday afternoon at 1:45. I have spent the morning putting together a slide that I have long wanted to have for presentations.