As our ability to study space has improved, our definitions of planets have evolved. Source link
Category: Planetary Society
Messengers of ice and time
Comets are ancient relics from the Solar System's formation that may have delivered water and the…
Why do some planets have rings and others…
This could be true, but simpler explanations exist — specifically, that Saturn’s rings could have been formed…
Stellar death and an Artemis overhaul
The road back to the Moon looks a little different now. On this week’s Planetary Radio,…
Chang’e-7: China’s water-hunting lunar south…
How will Chang’e-7 achieve its objectives? Chang’e-7 has 18 science payloads across its four spacecraft, including…
The impact of impacts | The Planetary Society
An ancient impact may have briefly made Umbriel cryovolcanic. Uranus’ dark, heavily cratered moon Umbriel has…
What is a “planetary alignment”?
When multiple planets spread across the sky at once, it’s called a planetary parade, or parade…
That’s a first! | The Planetary Society
An exoplanet first: an outer system rocky world. ESA’s Cheops spacecraft has observed an exoplanet system…
Historical NASA Budget Dataset | The Planetary Society
The Planetary Society maintains a comprehensive, open dataset that tracks NASA’s annual budget requests, congressional appropriations,…