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

The what-o-sphere? An explainer

Why do we need to slice up atmospheres into classifications like the troposphere, stratosphere, mesosphere, and thermosphere?

Clouds and haze and dust, oh my!

What types of aerosols do we find in the atmospheres around the Solar System, and why does what we call them—clouds vs. haze vs. dust—matter? Sarah Hörst explains.

New Rosetta view of the comet - and a comparison to other comets

Rosetta's view of the comet is getting better and better. Today they released a new image from the high-resolution OSIRIS camera, and it's a very fresh one, taken only two days ago. Distinct features are coming into view. And it's finally detailed enough for me to compare it to the five other comets we've visited in the past.

Terra Cognita

Pushing back the frontier, and filling in the blank spaces on the map.

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Space is vast. There's a lot of exploring to do.

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