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Small BodiesStories, updates, insights, and original analysis from The Planetary Society.
What are Jupiter’s Galilean moons?
An introduction to Jupiter's moons Io, Europa, Ganymede, and Callisto.
Laser pointer + cat = science
Learn why NASA got a cat to chase a laser pointer, see the Uranus system like never before, and catch up on this week’s space news.
China's plans for outer Solar System exploration
A Callisto impactor, a Uranus flyby, and a dedicated ice giant orbiter could be on China’s planetary exploration horizon.
How did Earth get its water?
Earth's water may have been on our planet since its formation, or could have been brought here by impactors early in our planet's history. Here's a look at the leading theories about where Earth's water came from.
Alien clouds and those that peer through them
From mythology to technology, clouds can’t keep us from seeing what lies beneath.
Your impact: December solstice 2023
Space advocacy ramps up in Washington.
The year in pictures: 2023
Looking back at 2023 through the eyes of spacecraft.
Looking for long waves
Why JWST observes in the infrared.
Getting around in space
Planets move around a star, spacecraft make their way across planets and through space, and Planetary Society members advance our mission.
Picks, pics, and peaks
Your picks for the Best of 2023, our favorite space pics, a mind-boggling peak speed, and more.
The best of 2023
The results are in for the Best of 2023! People around the world voted, and here are the winning space images, missions, exploration milestones, and more.
Gifts from above
Space exploration bestows us with many gifts, from scientific insights and beautiful images to technological marvels and inspiring achievements. Now it’s your turn to bestow some cosmic gifts.
Perfect gifts for space lovers, by space lovers
Planetary Society members helped us create our space gift recommendations for this year.
How NASA plans to deorbit the International Space Station
The aging complex will be replaced by commercially operated space stations, and deorbited as soon as 2030.
LightSail 2’s legacy lives on
On the one-year anniversary of LightSail 2’s end of flight, we look back at the mission that united so many.
How old is the Earth?
The Earth is thought to be about 4.54 billion years old. Learn more about how it formed, and how we know when this all happened.
Planetary paparazzi
Who needs candid celebrity snapshots? We’ve got all the best pics of your favorite planetary bodies.
The best pictures of Mars from space
Spacecraft have been taking pictures of Mars from space since 1965. Here are some of our favorites.
Lucy’s flyby of Dinkinesh: Everything you need to know
On Nov. 1, 2023, NASA’s Lucy spacecraft flew past Dinkinesh, a small asteroid in the main belt, and discovered a binary pair of moonlets in orbit around the asteroid.
Why aren't there more close-up images of Uranus and Neptune?
There aren't many close-up, high-resolution images of the ice giants Uranus and Neptune. The reason comes down to distance.