Where did we come from? Are we alone in the Universe? We can only answer these questions by exploring the planets and other worlds of our solar system and beyond. Learn why these worlds are so important, and how you can get involved.
What is a Planet?
It's right there in our name: The Planetary Society. But what is a planet? This seemingly simple question is the subject of much debate.Learn More
An introduction to full-sky astrophotography using a digital camera.
A Venusian biosignature, if confirmed, does not guarantee life, but it does represent a compelling argument for further exploration.
The kilometer-wide object won't hit Earth, but would cause global-scale devastation if it did.
Picking out your first telescope can be overwhelming. This easy-to-follow guide will help you find an affordable telescope that you'll actually use.