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 ...

Tiny grains from a distant asteroid are revealing clues to the magnetic forces that shaped the far reaches of the solar ...

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

Billions of years ago, Earth was home to extreme environments, including intense UV radiation, frequent volcanic eruptions, ...

Our universe is full of mysterious sights and sounds. Explore some of our most frightful finds from past Halloweens.

Despite the lack of a dedicated mission to the planet, scientists have learned plenty through ground observations and space ...

The solar system has nine planets, but in 2006 the International Astronomical Union declared Pluto a dwarf planet, making the ...

The Subaru Telescope has discovered new objects beyond the known Kuiper Belt, suggesting a more complex structure at the edge ...

A new study suggests that the planet’s icy interior and liquid ocean could be insulated with a three-to-six-mile-thick layer ...

N ASA's planetary defense telescope Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) has burned up in the ...

The imprecision in the measurements of claimed interstellar fireballs means it is highly likely they originate in the solar ...

When we think of exoplanets that may be able to support life, we home in on the habitable zone. A habitable zone is a region ...