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Europa’s Surface: Problems for a Lander?

26 Jan 2018, 18:20 UTC
Europa’s Surface: Problems for a Lander? NASA/JPL-Caltech/SETI Institute

What do asteroids 44 Nysa, 64 Angelina and the Galilean satellites Io, Europa and Ganymede have in common? They are all Solar System objects without an atmosphere that are highly reflective. They are also the subject of study in a new paper from Robert Nelson (Planetary Science Institute) that investigates a feature common to all: At small phase angles (the angle from the Sun to the target being observed), they show negatively polarized light.

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