Far beyond Neptune, in the frozen depths of the Kuiper Belt, many ancient objects oddly resemble giant snowmen made of ice and rock. For years, scientists wondered how these delicate two-lobed shapes ...

Microscopic crystals extracted from meteorites could help settle a debate about the birth of our patch of the Milky Way.

The boundary of the Solar System remains somewhat poorly understood. We know we are within it, in a region of space called the heliosphere, where particles released by the Sun dominate. Beyond it, the ...

A new paper in Monthly Notices of the Royal Astronomical Society argues the simplest answer may work: contact binaries like Arrokoth can form directly during the gravitational collapse of a dense ...

Far from the Sun’s heat, orbiting the outer planets of the solar system, are moons with oceans of liquid water beneath their frozen surfaces. Keith Cooper finds out how planetary scientists are ...

Researchers have finally determined the shape of the heliosphere, the magnetic bubble that protects our Solar System from galactic radiation. Unlike previous models, this zone, generated by solar wind ...