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Small BodiesStories, updates, insights, and original analysis from The Planetary Society.
Our best proof of life on Mars yet? A deep dive into Cheyava Falls
A strange rock on Mars is different from anything we’ve seen before in the search for life.
300 space advocates rally in D.C. to Save NASA Science
The Save NASA Science Day of Action drew nearly 300 people from across the United States to Washington, D.C., to promote space science and exploration.
What is comet 3I/ATLAS?
A roundup of key facts and surprising discoveries about the third known interstellar object.
Mars rock and roll
A Mars rock may hold answers in the search for life, and spacecraft might roll along its surface. Plus, meet the red planet’s Rolling Stones Rock.
A biosignature on Mars? Unpacking Perseverance's Cheyava Falls find
An interview with Joel Hurowitz of Stony Brook University, New York, one of the lead scientists involved in the discovery of possible biosignatures on Mars.
Award-worthy and record-breaking
From photographers to science communicators, this week we celebrate some well-deserved wins. Plus, our Day of Action is set to be the biggest ever.
Where do 3I/ATLAS and other interstellar visitors come from?
Interstellar interlopers like 'Oumuamua and 3I/ATLAS could be our best bet at exploring other stars.
Studying a distant visitor: What we know about Interstellar Object 3I/ATLAS
Key highlights from an interview with Dr. Bryce Bolin, lead author of a study on Interstellar Object 3I/ATLAS.
Don’t stare at the Sun (unless you’re SOHO)
The Solar and Heliospheric Observatory isn’t just a powerful tool for studying the Sun; it’s one of the best comet hunters in existence.
The Space Advocate Newsletter, September 2025
Who’s in charge of space policy?
An exciting discovery on Mars
NASA’s Perseverance rover has identified a potential biosignature on Mars.
NASA: Perseverance found possible biosignatures in Martian rock
NASA’s Perseverance rover has identified a potential sign of past life on Mars — not a definitive detection, but perhaps the most compelling hint yet.
Introducing Ari Koeppel, our first AAAS Policy Fellow
In a milestone that reflects our expanding advocacy and outreach presence in Washington, D.C., Ari Koeppel will join The Planetary Society as the organization's first AAAS Science & Technology Policy Fellow.
A cosmic perspective worth fighting for
NASA's science budget is under threat. Here's what that could mean to the human endeavor of exploration.
A test bed in the search for life
Updates from a Planetary Society STEP Grant-funded project.
Rethinking the atoms of life
Astrobiologists aren't just looking at other worlds to search for life; they're looking back to ancient Earth and considering alternate biochemistries.
Other Earths
Astronomers are closing in on planets that might be like our own.
The pale blue dot 35 years later
On its 35th anniversary, a reflection on what the pale blue dot means to us.
Are you ready for your close-up?
Close-ups of the Sun’s coronal loops and a tiny piece of Bennu can teach us a lot.
Rock, ice, and glass
The Solar System is full of rocky and icy bodies, but this particular galaxy is made of glass.