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Io and Voyager 2: Lost oceans and found signals

Planetary Radio: Space Exploration, Astronomy and Science

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Factors for Retaining Atmosphere and Water on Moons

This chapter explores the gravity as the main factor in determining whether a moon can retain an atmosphere and water. It discusses the difference in formation scenarios between Io and Europa, and how energy received from Jupiter affects water retention. The chapter also includes an ad for the Planetary Society's light sail program and appeals for support to secure a mission's legacy.

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