The James Webb Space Telescope (JWST) has discovered that a hazy sky over frozen Pluto is helping to cool the dwarf planet's atmosphere, while at the same time giving methane and other organic ...

How long does it take Pluto to orbit the sun? Learn more about how this planet makes one lap around our Solar System.

Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts ...

Pluto was turning out to be not just a frozen ball, but a body much more complex than most scientists had suspected. By that time, a revolution was under way that would reshape astronomers ...

In the outer reaches of our solar system, far beyond the orbit of Pluto, lies Sedna, one of the most mysterious objects ever ...

OF201, the object belongs to the same all-star family as Pluto: dwarf planets. Its diameter, roughly 435 miles (700 km), is half Pluto’s, ...

Even if Earth does survive, it won’t be pretty. The temperature of our planet will be about 1,300 degrees C, hot enough to ...

A star with a mass similar to our Sun passing within 10,000 astronomical units could disturb Oort Cloud, which is located far beyond Pluto and marks the outer edge of solar system.

Passing stars could trigger instability across the solar system, resulting in Earth being hauled out of its orbit.

A new study finds that galaxy clusters — cosmic cities packed with thousands of galaxies — trace invisible highways of dark ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...