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Stories, updates, insights, and original analysis from The Planetary Society.

Mariner 9 approaching Mars: a movie!

In celebration of the 40th anniversary of Mariner 9's November 13, 1971 arrival at Mars, Daniel Macháček has produced a morphed animation of the images that Mars' first orbiter took while approaching the planet.

Sungrazing with Lovejoy's Comet

Observations of the newly sighted Kreutz sungrazer comet C/2011 W3 (Lovejoy) from the ground and from SOHO (a joint NASA/ESA satellite) and STEREO (NASA's Solar Terrestrial Relations Observatory).

Curiosity, from a 1935 perspective

With a new rover, Curiosity, on its way to Mars, Jason Davis takes a look at what we knew - or thought we knew - about the planet back in 1935.

First-ever high-resolution Synthetic Aperture Radar image of Enceladus

On the November 6, 2011 flyby of Enceladus -- the third such flyby in just a few weeks -- the Cassini mission elected to take a SAR swath instead of using the optical instruments for once. So here it is: the first-ever SAR swath on Enceladus. In fact, the only other places we've ever done SAR imaging are Earth, the Moon, Venus, Iapetus, and Titan.

Dawn Journal: Riding gravitational currents to LAMO

In this update on the Dawn mission, project system engineer Marc Rayman reports that the probe is headed for its low altitude mapping orbit (LAMO), where it will focus on making a census of the atomic constituents and on mapping the gravity field in order to determine Vesta's interior structure.

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