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Stories, updates, insights, and original analysis from The Planetary Society. 

Solar system montage with eight planets

Deep Inside Europa

In 1995, 572 astronaut applicants were narrowed down to 125 based on their resumes and English scores, then down to 48 based on paper exams and brief medical checks. These 48 candidates went through a week of comprehensive medical checks and job interviews.

Apollo 11 Quarantine Trailer

Apollo Plus 40

The editors of the site, Nature, have begun their ApolloPlus40 blog.

HiRISE Imager Primary Mirror

Gravity's Bow

Timothy Reed explains how optical telescopes are tested for gravity sag, and the methods used to counteract or compensate for it.

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