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Planetary Society Advent Calendar for December 7: Jupiter

Emily Lakdawalla • December 07, 2009

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

Emily Lakdawalla • December 07, 2009

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.

Two new names in the solar system: Herse and Weywot

Emily Lakdawalla • November 12, 2009

Via the USGS I learned that Jupiter has passed a milestone of sorts, and now has fifty named satellites.

Planetary Radio Q and A: Not-so-gassy giants

Emily Lakdawalla • November 04, 2009

On Planetary Radio's "Questions and Answers" I answered this question: "I read that Uranus got its tilt when it was hit by another object. What does it mean for a ball of gas to be hit -- wouldn't another object just pass through it?"

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