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

2007 OR10 Needs a Name!

It’s time to give 2007 OR10 a name. We’re asking for your help to pick a suitable name for the largest as-yet-unnamed solar system world to submit to the International Astronomical Union (IAU).

Beresheet Has Entered Lunar Orbit!

SpaceIL's Beresheet Moon lander successfully entered lunar orbit today after a 6-minute engine burn that began at 14:18 UTC / 10:18 EDT.

Not a Heart of Ice

Mark Marley explains what planetary scientists mean when they say the word

The Skies of Mini-Neptunes

A GREAT QUEST is underway to discover Earthsize worlds in their stars’ habitable zones. Along the way, astronomers have been surprised to learn that the most typical size of planet in our galaxy is one with no counterpart in our own solar system.

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