Comparing the rivers of Earth, Mars, and Titan
Planetary Radio: Space Exploration, Astronomy and Science
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The Week in Space History
On July 20th, you can check out the Crescent Moon joining in and near reddish Mars. On this week in space history, a couple of big spacecraft flybys separated by many a year took place. Mariner 4 gave us our first glimpse at the red planet up close. And a few decades later in 2015, New Horizons flew by Pluto and the Pluto system giving us all sorts of fun surprises.
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