Volume 33, number 3
September Equinox 2013
Polygons on Mars
Download this issue as a PDF
(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.
Fifteen years ago, Society members and passionate space advocates like you helped save the Pluto mission. Now we can do the same for missions to Europa and Mars.
Join over 27,600 people who have completed their petition and consider a donation to support advocacy efforts.