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Stories, updates, insights, and original analysis from The Planetary Society.
Planetary Society Advent Calendar for December 15: Mars
We have three orbiters and two rovers currently exploring Mars, each of which returns breathtaking photos on a daily basis.
Class announcement: How to play with Mars Express VMC images
Those of you who follow me on Twitter know that I've been fiddling with images from the Mars Webcam, more officially known as the Mars Express Visual Monitoring Camera (VMC), for the last couple of weeks.
A teeny weeny bit of movement in Spirit's right front wheel
The ever-vigilant Doug Ellison just posted this animation, which really actually does show a teeny tiny bit of motion in the right front wheel. If you don't notice any motion, look closer.
Planetary Society Advent Calendar for December 14: The Moon
The Moon is the most familiar of the objects in the heavens.
Planetary Society Advent Calendar for December 13: Dactyl
If you don't think Pluto gets enough respect, just imagine what it's like to be a satellite of an asteroid.
Planetary Society Advent Calendar for December 12: Saturn
Cassini's amazing cameras have set a new standard for the quality, sharpness, resolution, beautiful color, and all-around spectacularness of images returned from the outer solar system.
Planetary Society Advent Calendar for December 11: Io
This is a special post for all of my readers who are lighting the first candle on their menorot this evening.
Awesome Mars Express view of Phobos and Deimos together
My inbox was exploding this morning with messages about a tremendously cool animation released this morning by ESA's Mars Express team. It shows Phobos crossing Deimos, in what's known as a
The Norway Spiral
I had a fun conversation with Paul Harris just now on his show at KTRS about the crazy spiral that showed up in Norwegian skies yesterday.
Planetary Society Advent Calendar for December 10: Triton
Welcome to the tenth post in my
Planetary Society Advent Calendar for December 9: Atlas
Here's another weird-looking one, though it's less weird from this particular, polar point of view than it is when viewed from the side.
Planetary Society Advent Calendar for December 8: Itokawa
I love this asteroid. It's just so weird-looking.
Planetary Society Advent Calendar for December 7: Jupiter
Jupiter has been high overhead at sunset for several months, a brilliant light that's easy to spot even when the sky is still bright at dusk; but it's now moving quickly to the west as Earth speeds ahead of Jupiter's more stately march around the Sun.
Planetary Society Advent Calendar for December 6: Umbriel
Umbriel is the darkest moon in a pretty dark place in the solar system, the Uranus system.
Planetary Society Advent Calendar for December 5: Epimetheus
Epimetheus is one of the many small moons of Saturn that are referred to by the Cassini mission team as
Planetary Society Advent Calendar for December 3: Europa
From a distance, Jupiter's fourth largest moon Europa is the smoothest object in the solar system; its outline traces out a perfect circle.
Planetary Society Advent Calendar for December 2: Mathilde
253 Mathilde is the largest asteroid that has ever been visited by a spacecraft. It's held that distinction for more than twelve years, but next year it'll be upstaged by the considerably larger 21 Lutetia, which Rosetta will fly by on July 10.
Planetary Society Advent Calendar for December 1: Dione
I've always loved advent calendars and the way they both managed and heightened my anticipation of the gift-opening frenzy of Christmas morning.
Spectacular animation of Halley's comet
It's a holiday and I'm enjoying time with the family, so rather than write a lot, I will let a spectacular image do the talking for me.
Saturn's aurora, even better than before
The Cassini imaging team have posted their own processed and captioned version of the Saturn's aurora movie that I posted a preview of about six weeks ago, and it was worth the wait.