Explore Worlds
Find Life
Defend Earth
All
All
Sun
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Small BodiesStories, updates, insights, and original analysis from The Planetary Society.
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.
Want to experience the 2024 total solar eclipse? Here are some tips.
We asked two eclipse chasers for tips on how to plan your big moment in the Moon's shadow.
A guide to eclipse vocabulary
A list of useful words and terms relating to lunar and solar eclipses.
Cometary sights and sounds
Discover what causes a comet’s color and what it might be like to listen to one whiz by.
A checklist for what to expect during the 2024 total solar eclipse
Know what to expect ahead of time, and be prepared to experience a cosmic spectacle like nothing else in nature.
How to see newly discovered Comet Nishimura
Comet Nishimura was discovered in August 2023, and is passing close to Earth and the Sun in September. Learn more about it and how to find it.
See for yourself
See the month’s coolest space pictures, see planets in the night sky, and create the future in space that you want to see.
Moonstruck
Exploring humanity’s long relationship with the Moon.
A lunar saga
How the origins of the Moon could shape the future of human space exploration.
What would happen if an asteroid hit the Moon?
If a large asteroid impacted the Moon, would it cause problems for us here on Earth?
Storms and showers
Mars has storms of dust, while Saturn pours down ammonia rain. Here on Earth, we passed through a debris tail to get a special kind of shower.
Hasta la vista, baby
Terminators abound this week in space, and we’ll be back to Mars if NASA gets the budget it needs.
That’s a mare
An unusual lunar feature, Saturn’s shining rings, and Mars’ complex gullies.
Speedy spacecraft and pretty pics
Take a look at some of our favorite recent space images and learn about an express mission to Mars.
Searching the skies to keep us all alive
Astronomers around the world are working to protect the Earth from asteroid impacts, with the help of Planetary Society members and donors.
Day and night, it’s all about starlight
This week in space: Mars days almost match up with ours, and light and molecules are created by distant stars.
The scientific truth is out there
The real science of aliens, the policy implications of ET, and new views of worlds beyond our own.
Would you like some salty water with your space salad?
Two new grant-winning projects, a collection of awesome space imagery, a mighty plume, and much more this week in space.
Way out there
We’re always learning more about the worlds of the outer Solar System, and even those beyond.
Moon-spying missions and a planetary evil twin
Whether they’re dedicated to it or not, planetary missions can get beautiful and informative glimpses at distant moons. And who’s the evil twin: Venus or Earth?