The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

Cheng discovered the object as part of an ongoing research project to identify TNOs and possible new planets in the outer ...

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

The icy moons of the Solar System, like Europa around Jupiter and Enceladus around Saturn, are the most likely candidates in ...

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

NASA's Perseverance rover is exploring a new Mars region called Krokodillen, which is thought to harbor some of the oldest and most intriguing rocks on the Red Planet.

Tianwen, which means "questions to heaven," is the name given to China's program of robotic Solar System exploration. Tianwen ...

NASA is preparing to explore Titan, Saturn’s largest moon - and possibly our best chance at a second home in the solar system. With a thick atmosphere, stable surface, and resources like methane and ...