It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

Scientists are intrigued after spotting a highly unusual celestial object lurking at the very edge of our solar system.

Astronomers have discovered a new dwarf planet, named 2017 OF201, far beyond Pluto's orbit. It takes 25,000 years to orbit ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be ...

The unusual orbit of a possible dwarf planet, known as 2017 OF201, makes it less likely that our solar system contains a ...

This solar cycle still ... that surrounds our planet and deflects much of the most dangerous emissions. The risks of solar activity stretch throughout the solar system, however.

Venus begins a season-long absence from the sky, hidden by the glow of the Sun as it slowly passes behind our star, not returning to our view until August. It reaches superior conjunction on June 4, ...

but both men previously suggested a “Planet X” existed in the far reaches of the solar system. “It’s kind of fun that a paper that purports to find a candidate for Planet Nine is really ...

A new batch of 65 planets located outside our solar system joined the NASA Exoplanet Archive, triggering a celebratory mood. "It's not just a number," Exoplanet Archive science lead Jessie ...

To understand how chaotic the early solar system was ... The Beta Pictoris system and the exoplanet are the subject of much research. Research shows that the planet is enriched with metals ...

Sponsor Message Our system is much stranger. The answers can be surprisingly philosophical — and at times, even poetic. This episode of Planet Money was produced by James Sneed with help from ...