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Small BodiesStories, updates, insights, and original analysis from The Planetary Society.
Beyond the unknown: The coming Kuiper belt revolution
Discoveries about the worlds of the Kuiper belt could revolutionize our understanding of the Solar System and its ancient past.
Messengers of ice and time
Comets are ancient relics from the Solar System's formation that may have delivered water and the building blocks of life to early Earth.
How do you define a planet?
As our ability to study space has improved, our definitions of planets have evolved.
Meet Jennifer Vaughn
Planetary Society CEO Jennifer Vaughn answers questions about her history with the organization, her vision for its future, her love of space, and more.
The view from the top
The Vera C. Rubin Observatory has a great view of the Cosmos — and of the Earth below.
Why do some planets have rings and others don't?
The giant planets of our Solar System all have rings, as do some dwarf planets and even asteroids. So why don’t Mercury, Venus, Earth, or Mars?
Stellar death and an Artemis overhaul
A planetary nebula teaches us about how stars die, and a new Artemis architecture changes our plans for Mars.
The impact of impacts
Collisions are often the reason things are the way they are in the Solar System today.
What is a "planetary alignment"?
What to expect when multiple planets appear in the sky together.
The Space Advocate Newsletter, Februrary 2026
Musk fought the Moon and the Moon won.
That’s a first!
From the first lunar landing to a leader’s first week in a new job, there are lots of firsts to celebrate this week.
An interplanetary team effort
Although spacecraft may be isolated in space, they’re far from alone.
Setting our sights
The future of space exploration is right around the corner.
The Artemis II mission: What to expect
NASA is preparing to send humans back to the Moon for the first time in over 50 years. The Artemis II mission will send a crew of four astronauts on a 10-day mission around the Moon and back to Earth. Here’s what to expect from the upcoming mission.
NASA is funded. Now what?
With the upheaval of 2025 behind us, here's what we're looking for in space policy this year.
Better together
Martian travel buddies, synchronized Sun science, and a proven leadership team.
The next chapter begins
Longtime Planetary Society CEO Bill Nye is handing over leadership of the organization to take on a new role as Chief Ambassador.
The Space Advocate Newsletter, January 2026
Savor this victory.
Comebacks, curveballs, and countdowns
Artemis II rolls out to the launchpad, two troubled space missions return safely to Earth, and a Mars mission is declared likely lost.
NASA has lost a spacecraft around Mars. Is MAVEN gone for good?
A pioneering spacecraft has gone missing around Mars, and NASA says the mission is probably unrecoverable.