The Sun’s activity is peaking, while NASA’s budget is facing historic lows.

How other worlds experience auroras.

How advanced amateurs defend Earth from asteroids.

A photographer’s guide to auroras.

The magnetism behind spectacular phenomena.

How a grassroots movement sailed on sunlight.

How a spacecraft is able to touch the Sun.

The White House has put forward a radical, wasteful proposal for NASA. We have the data to prove it.

NASA’s budget is officially in grave danger, but there are things you can do to help.

Planets and moons change size all the time, whether by attracting mass, shrinking in volume, or spewing their insides out of volcanoes.

Long-exposure photography can help see dim, distant light sources. It can also show us familiar lights in totally new ways.

Our rovers and astronauts leave tracks where they explore. But there’s always the possibility that those tracks — and even entire missions — could be erased.

NASA’s science budget is facing historic cuts, and advocates like you need to speak up. Jupiter has its own turbulence, too, but to learn more about it, we’ll need to fund NASA.

Proposed NASA cuts would cancel dozens of space missions — including spacecraft already paid for, launched, and making discoveries.

The conditions for intelligent life to arise don't seem uncommon in the Cosmos. So where is everybody?

Space telescopes teach us so much about the Solar System and beyond. It’s crucial that we keep funding them.

NASA science faces record cuts. Take action to stop it—we'll show you how.

How a message to aliens captured the human spirit.

When we explore space, we make discoveries — about never-before-seen asteroids, unusual exoplanets, and even our own planet. But to find out new things, we have to continue seeking.

The Planetary Society celebrates 45 years of advocating for space science and exploration.