Artistic image of Psyche spacecraft with outstretched solar panels over asteroid
A ridge that is comprised of lunar rock is grey in color with silver highlights. A large dark shadow reaches out behind the central peak of Tycho. The foreground is comprised of smaller mounds of the crater that are similarly illuminated by sunlight.

Planetary Science Programs

NASA's Planetary Science Division programs lead the exploration of planets and other objects in our solar system, seeking to better understand the origins of celestial bodies and uncover whether signs of life exist elsewhere.

Explore the Planetary Science Programs

Lucy Mission Illustration


Discovery is an ongoing program that offers the scientific community the opportunity to design exciting, focused investigations that complement NASA's larger planetary science explorations.

Here to Observe program logo shows an artistic rendering of a planet with a magnifying glass in orbit around it, yellow drawing on black background. There are yellow stars and black text: Here to Observe, with blue text below: NASA PSD.

Here to Observe (H2O)

Here to Observe (H2O) is designed to spark and maintain an interest in STEM careers for underrepresented students through programs funded by NASA's Planetary Science Division.

plain viewed from above with craters, spacecraft and foot trails visible

Lunar Discovery and Exploration

The Vision for Space Exploration is fostering a renaissance in lunar science, as the return of humans to the Moon both requires and enables greater scientific understanding of Earth's natural satellite.

perseverance rover

Mars Exploration Program

The Mars Exploration Program is a science-driven program that seeks to understand whether Mars was, is, or can be, a habitable world.

juno arrives

New Frontiers

The New Frontiers Program represents a critical step in the advancement of solar system exploration.

The pale gray of Europa is seen against the blackness of space.

Outer Planets and Ocean Worlds

The Galileo and Cassini missions to Jupiter and Saturn have greatly deepened our understanding of those giant planets and their intriguing moons.

Illustration of NASA’s DART spacecraft and the Italian Space Agency’s (ASI) LICIACube prior to impact at the Didymos binary system.


The Planetary Defense Coordination Office (PDCO) addresses the hazards of Near-Earth objects, which are asteroids and comets whose orbits can bring them within 30 million miles of Earth’s orbit.


Small spacecraft and satellites help NASA advance scientific and human exploration, reduce the cost of new space missions, and expand access to space.



The Solar System Exploration Research Virtual Institute (SSERVI) addresses scientific questions fundamental to understanding the Moon, Near Earth Asteroids, the Martian moons Phobos and Deimos, and the near space environments of these target bodies.

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