Volume 33, number 3
September Equinox 2013
Polygons on Mars
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(Planetary Society members only)
2 Bruce Murray: 1931-2013: Louis Friedman remembers our co-founder and friend.
8 The Enigmatic Polygons of Mars: Dorothy Oehler explains how giant polygons might have formed on Mars.
13 Forging a New Consensus: Casey Dreier reports on our progress in Washington.
14 Upgrades to the Search: Bruce Betts on improved SETI and Exoplanet Telescope Searches.
17 Power From the Isotopes: Casey Dreier discusses restarting plutonium-238 production.
Planetary Society Kids: What happens when hot lava cools?
4 Your Place in Space A heartfelt “Thank You” from Bill Nye.
6 Planetary Radio Online radio brings exciting guests!
6 On Planetary.org What’s happening online?
7 Q&A Ganymede’s liquid layer.
15 What’s Up? Comet ISON and a hybrid solar eclipse.
16 Members’ Dialogue We hear you!
23 Snapshots From Space Europa in beautiful color.