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

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.

Four hundred and fourteen years since Galileo

Galileo, the scientist, discovered the Galilean satellites of Jupiter four hundred years ago next month, while Galileo, the mission, arrived at Jupiter to study those moons in situ fourteen years ago Sunday.

If Earth had rings

I am the very last space blogger in the universe to post about this video, but that doesn't make it any less cool.

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.

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.

Encouraging motion on Spirit

It really looks like the second attempt at driving Spirit out of the trap has had the hoped-for result: some forward progress (maybe about a centimeter), and no evidence for further downward sinking.

LCROSS team: "Yes, we found water!"

I just posted a story on the announcement today that LCROSS definitely found lots of water in the spectra from their October 9 impact.

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