Discoveries about the worlds of the Kuiper belt could revolutionize our understanding of the Solar System and its ancient past.

Planetary Society CEO Jennifer Vaughn answers questions about her history with the organization, her vision for its future, her love of space, and more.

As our ability to study space has improved, our definitions of planets have evolved.

Comets are ancient relics from the Solar System's formation that may have delivered water and the building blocks of life to early Earth.

The Vera C. Rubin Observatory has a great view of the Cosmos — and of the Earth below.

The giant planets of our Solar System all have rings, as do some dwarf planets and even asteroids. So why don’t Mercury, Venus, Earth, or Mars?

A planetary nebula teaches us about how stars die, and a new Artemis architecture changes our plans for Mars.

Chang’e‑7 is China’s mission to seek out water ice on the Moon.

Collisions are often the reason things are the way they are in the Solar System today.

What to expect when multiple planets appear in the sky together.

From the first lunar landing to a leader’s first week in a new job, there are lots of firsts to celebrate this week.

A comprehensive, open dataset of NASA budget requests, congressional appropriations, and workforce data from 1958 to the present.

Although spacecraft may be isolated in space, they’re far from alone.

The future of space exploration is right around the corner.

NASA is preparing to send humans back to the Moon for the first time in over 50 years. The Artemis II mission will send a crew of four astronauts on a 10-day mission around the Moon and back to Earth. Here’s what to expect from the upcoming mission.

With the upheaval of 2025 behind us, here's what we're looking for in space policy this year.

Martian travel buddies, synchronized Sun science, and a proven leadership team.

Longtime Planetary Society CEO Bill Nye is handing over leadership of the organization to take on a new role as Chief Ambassador.

Artemis II rolls out to the launchpad, two troubled space missions return safely to Earth, and a Mars mission is declared likely lost.

A pioneering spacecraft has gone missing around Mars, and NASA says the mission is probably unrecoverable.