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

What the Shoemaker-Levy 9 Impact Taught Us

Twenty-five years ago, multiple fragments of comet Shoemaker-Levy 9 crashed into Jupiter, changing the face of the planet and the course of planetary science.

Pretty Pictures of the Cosmos: Lesser-Known Luminaries

Award-winning astrophotographer Adam Block shares some of his latest images highlighting some hidden gems.

Where We Are on 1 April 2019

Emily Lakdawalla takes us on a tour of the spacecraft currently exploring from within our solar system. All planets and spacecraft locations are shown at their location for April 1st, 2019.

This Thanksgiving, avoid the politics and talk space instead

If you're expecting to gather with extended family on Thanksgiving, avoid the politics. Here are some conversation starters to use at the dinner table that everyone can engage in.

A journey to Jupiter: Amateur astronomers create 1,000-image video of planet in motion

Peter Rosén shares an amazing animation of Jupiter made from more than 1,000 images taken by 91 amateurs from around the world.

On Cosmic Discovery and Human Significance

Jake Rosenthal takes us on a tour of the history of discovery of our place in the cosmos.

DPS/EPSC update: 2007 OR10 has a moon!

The third-largest object known beyond Neptune, 2007 OR10, has a moon. The discovery was reported in a poster by Gábor Marton, Csaba Kiss, and Thomas Mueller at the joint meeting of the European Planetary Science Congress and the Division for Planetary Sciences of the American Astronomical Society (DPS/EPSC) on Monday.

Rapidly Rotating Regular Satellites and Tides

Pluto’s small moons have unusual rotation rates and states. Now we know a moon of another dwarf planet does as well. Is there a connection?

Hubble Series 1: How to Find Hubble Data

Processing Hubble data presents a host of challenges, and the first of these has nothing to do with processing at all.

A Moon for Makemake

The solar system beyond Neptune is full of worlds hosting moons. Now we know that the dwarf planet Makemake has one of its very own.

Jupiter Weather Report: 2014/15 Apparition

A summary of Jupiter's changing face as seen from Earth during its 2014/2015 apparition.

A moon with atmosphere

What is the solar system moon with the densest atmosphere? Most space fans know that the answer is Titan. A few of you might know that Triton's is the next densest. But what's the third? Fourth? Do any other moons even have atmospheres? In fact, they do; and one such atmosphere has just been discovered.

An internal ocean on Ganymede: Hooray for consistency with previous results!

A newly published paper confirms a subsurface ocean at Ganymede. An ocean there was already suspected from its magnetic field and predicted by geophysics; new Hubble data confirms it, and even says it is in the same place we thought it was before. Such consistency is rare enough in planetary science to be worth celebration.

Some Recent Views of Mars from Hubble

Ted Stryk showcases some of his processed versions of recent Hubble Space Telescope views of Mars.

Mars Orbiter Mission delivers on promise of global views of Mars

Ever since I first learned about the capabilities of Mars Orbiter Mission's small payload of science instruments, I have been anticipating one type of data in particular: global color views of Mars captured in a single 2000-pixel-square frame. Just days after entering orbit, Mars Orbiter Mission has delivered on that promise.

Hubble to the rescue! The last-ditch effort to discover a Kuiper belt target for New Horizons

Will New Horizons have a mission after Pluto? Ground-based searches have failed to turn up anything that New Horizons can reach. Now Hubble is joining the search, but time is running out: a discovery must be made within the next two months.

Comet Siding Spring Mars encounter: Cosmic bully spotted by ESA and NASA

Hubble has taken some great new images of our 'friend,' Comet Siding Spring, due to pass by Mars at less than 136,000 km on October 19 – less than half the distance between Earth and our moon.

Predicting Pluto's moons and moondust

Why didn't we discover Pluto's moons until more than a decade after Hubble launched? Mark Showalter helps me answer this question.

Super-close supernova in M82

The astronomy world is all a-twitter this morning over the discovery of a new supernova in M82, a galaxy that's in our astronomical backyard,

Snow balls in space

I don’t get much snow in southern California, but I do spend a lot of my time thinking about college snowball experiences and about the snowball fights that have made the objects of the outer solar system.

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