Why Can't We Find Planet 9? Deep in the outer reaches of our solar system, far beyond Neptune and Pluto, something massive is ...

China advances plans for dual solar system boundary missions China has published coordinated papers outlining dual missions ...

Ever wonder how a spacecraft millions or even billions of miles from the Sun can keep its lights on? After all, solar panels become less efficient the farther you travel into the outer solar system ...

The sun’s outer atmosphere resembles a pufferfish.

In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new dwarf planet. It's called 2017 OF 201, a rock that appears to be some 700 ...

In June 1983, newspaper headlines declared that NASA’s Pioneer 10 spacecraft had left the solar system, crossing beyond the orbit of Neptune. It was the common view of the time: All of the solar ...

Earth’s orbit around the Sun defines everything we take for granted. Day and night, the seasons, and the steady presence of ...

The outer reaches of our Solar System continue to reveal a complex dynamical environment where the interplay of gravitational forces shapes the orbits of a myriad of distant bodies. Research in this ...

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds silently loop around their stars. Some drift as far as 10,000 times the distance ...

The orbit of 2023 KQ 14 (in red) compared to the orbits of the other three sednoids (in white). 2023 KQ 14 was discovered near its perihelion at a distance of 71 astronomical units (71 times the ...