Co-founded by Carl Sagan in 1980, The Planetary Society is a member-funded nonprofit organization dedicated to advancing space science and exploration through three core enterprises.

Jun 23, 2026 · The meaning of PLANETARY is of, relating to, being, or resembling a planet. How to use planetary in a sentence.

Jun 23, 2026 · NASA’s planetary science program explores the objects in our solar system to better understand its history and the distribution of life within.

Planetary science is the study of planets, moons, and other small bodies in our solar system. Planetary scientists work across a wide range of fields to learn about everything from planetary atmospheres to …

Planetary science (or more rarely, planetology) is the scientific study of celestial bodies (such as planets (including Earth), moons, asteroids, comets) and planetary systems (in particular those of the Solar …

Jun 1, 2026 · There are five officially recognized dwarf planets in our solar system: Ceres, Pluto, Haumea, Makemake, and Eris. What is a planet? The word traces back to the ancient Greek word …

What’s up in the night sky: June 2026 Our monthly feature focuses on easy and fun things to see in the night sky, including eclipses, supermoons, meteor showers, planetary conjunctions, and more.