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

The Next 10 Years

Six scientists share the major planetary science discoveries of the past decade, and the questions that will drive the next 10 years of solar system exploration.

A new look at Europa, with old data

Ted Stryk shows us a new color, near-global view of Europa made from Galileo spacecraft data captured in 1996.

Space grade electronics: How NASA’s Juno survives near Jupiter

Take a look at how electronics of spacecraft are built to survive the harshness of space environments.

Jupiter's Great Red Spot

On the 20th anniversary of Galileo's orbit insertion around Jupiter, amateur image processor Björn Jónsson shares some of the mission's first images of Jupiter's iconic massive storm.

Galileo's best pictures of Jupiter's ringmoons

People often ask me to produce one of my scale-comparison montages featuring the small moons of the outer solar system. I'd love to do that, but Galileo's best images of Jupiter's ringmoons lack detail compared to Cassini's images from Saturn.

New Robotic Spacecraft Posters

Another round of posters to celebrate historic planetary missions.

The not-planets

Now that I have a reasonable-resolution global color view of Pluto, I can drop it into one of my trademark scale image montages, to show you how it fits in with the rest of the similar-sized worlds in the solar system: the major moons and the biggest asteroids.

Mapping Europa

Several global maps have been made of Europa, but amateur image processor Björn Jónsson felt they could be improved—so he decided to make a new one.

Flawed Beauties

More examples of imperfect--but tantalizing--images from deep space.

LPSC 2014: Plate tectonics on another world: Europa

Simon Kattenhorn and Louise Prockter may finally have found subduction zones on Europa, which would it the only other place in the solar system besides Earth that is known to have active plate tectonics.

Through a Glass, Darkly

When sent from deep space, even imperfect images can inform and amaze.

Destination: Europa!

It's time to reassess Europa exploration, past, present and future. The Destination Europa! session at AGU, inspired by the eponymous website and movement, didn't take exactly that message as its theme, but it's what I got from the presentations. What an ELECTRIFYING meeting this has been for Europa exploration!

A serendipitous observation of tiny rocks in Jupiter's orbit by Galileo

A look at an older paper describing Galileo's possible sighting of individual ring particles orbiting Jupiter as companions to its inner moon Amalthea.

Galileo's images of Gaspra

Last week I trawled the archives to find all of Galileo's images of asteroid Ida; this week, I turned to Gaspra.

Galileo got so many more images of Ida than I realized

While writing up the cruise-phase issues of the Galileo Messenger a couple of weeks ago, I came across a fuzzy montage of images of Ida that I had not seen before. So I decided to spend some time digging into the Planetary Data System to see if there were more images to be found. I found lots and lots pictures that I'd never seen before!

Galileo Messengers: Cruise to Venus, Earth, Gaspra, Earth, Ida, and almost to Jupiter

It's taken me a year to face the emotionally draining task of reading and writing about Galileo's cruise phase as chronicled in the mission's newsletters.

My ever-popular asteroids-and-comets montage, now in color, with bonus Toutatis

My collage of all the asteroids and comets visited by spacecraft is probably the single most popular image I have ever posted on this blog. I've now updated it to be in color and to include Toutatis.

In Honor of JUICE, a New View of Europa

To celebrate ESA's selection of the JUICE mission to Jupiter, Ted Stryk produced a new global view of Europa from Galileo data.

Blast from the past: The Galileo Messenger

From 1981 to 1997, the Galileo mission published an approximately quarterly newsletter called the Galileo Messenger. It eventually ran to 45 issues, until the end of the Prime Mission. The first 20 were published before Galileo ever got off the ground. That period is the subject of this post.

Is Europa's ice thin or thick? At chaos terrain, it's both!

Among Europa scientists there are two warring factions: the thick-icers and the thin-icers. The question is how thick is the ice shell that overlies Europa's subsurface ocean (the existence of which pretty much everyone agrees on).

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