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Small BodiesStories, updates, insights, and original analysis from The Planetary Society.
Rogue worlds and the boundaries of planethood
Exploring rogue planets, how they form, and how they expand our conception of what counts as a planet.
The year in pictures 2025
The most memorable and impactful images from space exploration in 2025.
The Planetary Society's Best of 2025 Winners
The official results of The Planetary Society's Best of 2025 voting campaign.
“We’re made of starstuff.” What does that mean?
Carl Sagan's famous quote is more than just poetic — it's true.
What is comet 3I/ATLAS?
A roundup of key facts and surprising discoveries about the third known interstellar object.
A test bed in the search for life
Updates from a Planetary Society STEP Grant-funded project.
The pale blue dot 35 years later
On its 35th anniversary, a reflection on what the pale blue dot means to us.
When space rocks get too close for comfort
Some of the best-documented encounters Earthlings have had with asteroids and meteorites.
Scientists behind threatened NASA missions explain what’s at stake
Here is what they have to say, in their own words.
It's not magic; it's magnetic!
The magnetism behind spectacular phenomena.
Not too hot to handle
How a spacecraft is able to touch the Sun.
The Fermi Paradox: Where are all the aliens?
The conditions for intelligent life to arise don't seem uncommon in the Cosmos. So where is everybody?
The Voyager Golden Records: A cosmic love letter
How a message to aliens captured the human spirit.
Are we alone in the universe? AI may help us find out
A Planetary Society-funded project uses machine learning to search for intelligent alien life.
Computing in space exploration history
Before artificial intelligence, there was human ingenuity.
EELS and the future of exploration
How artificial intelligence could traverse other worlds
How space explorers could grow habitats from fungus
A NASA-funded project is exploring the possibility of using mycelium — the root-like structure in fungi — to grow habitats on the Moon or Mars.
Should you be worried about Asteroid 2024 YR4?
Experts weigh in about the recently discovered near-Earth asteroid 2024 YR4 that has about a 1% chance of impacting Earth on Dec. 22, 2032.
The Planetary Society’s role in real space missions
Since 1980, The Planetary Society has been active in over 20 space exploration missions, from leading public outreach efforts to funding the development of instruments.
Mars’ enduring role in the search for life
New discoveries underscore why we must keep exploring the red planet.