Genesis Model

Through an innovative combination of missions involving commercial and international partners, NASA’s robotic lunar surface missions will begin as early as 2020.

New data from NASA's Cassini spacecraft may solved a longstanding mystery. The length of a day on Saturn: 10 hours, 33 minutes and 38 seconds.

By looking at the Moon, the most complete and accessible chronicle of the asteroid collisions that carved our young solar system, a group of scientists is challenging our understanding of a part of Earth’s history.

New measurements of the mass of Saturn's rings reveal their age — and something they have in common with dinosaurs.

Data from NASA's New Horizons spacecraft, which explored Kuiper Belt object Ultima Thule earlier this week, is yielding scientific discoveries daily.

Images of the Kuiper Belt object Ultima Thule unveil the very first stages of solar system's history.