Known as trans-Neptunian objects (TNOs), these celestial remnants provide crucial insights into the dynamic history of the ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

Fastest Known Planetary System May Have Been Pushed by Our Galaxy’s Supermassive Black Hole ...

In 2016, scientists Michael Brown and Konstantin Batygin suggested that an unseen Planet Nine could explain the unusual ...

Legendary Star Lacks Evidence for Large Planet Construction Ever since the dawn of human consciousness, skywatchers have been ...

Astronomers have long noticed that some trans-Neptunian objects exhibit unusual, clustered orbits, hinting at an unseen ...

The probe will orbit the sun "close enough to pass inside a solar eruption, like a surfer diving under a crashing ocean wave, ...

Astronomers have discovered a rocky Earth-like planet around a white dwarf star, hinting at our planet's future about eight billion years from now.

The 7 fastest planets in the solar system, ranked by their orbital speeds around the Sun, are as follows: Mercury is the fastest planet in our solar system, orbiting the sun at an average speed of 47.

Jaw-dropping new images show Jupiter in eye-popping detail. NASA’s Juno spacecraft captured incredible views of the stormy ...

Our solar system consists of Sun and celestial bodies bound to it by gravity, including planets, moons, asteroids, and comets ...

Comets have long been seen as omens and portents, and it's easy to understand why. They first appear as faint smudges of light in the sky, sometimes fading soon after and sometimes becoming brighter ...