PalaceGuard,

The Deep Impact / Rosetta missions are reminiscent of the Ranger / Surveyor missions to the moon in the ‘60s. The Ranger series came first, and crashed or hard landed onto the moon, while the Surveyor missions were more advanced and soft landed.

The different mission series each provided useful information for the Apollo landing site selection. Next week, July 20, it will be 36 years ago that Apollo 11 landed on the Sea of Tranquility.

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Eudaimonia