Ever since the International Astronomical Union recognized Haumea and Makemake as dwarf planets in 2008, University of Maine ...

Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

Simply put, the moon is useful in a way that no other astronomical object is. That's because it's the nearest, most easily ...

At the heart of Reflect Orbital's project are its Mylar mirrors. Each satellite will unfurl a 33-by-33-foot sheet of lightweight polyester film known for its durability ...

The University of Iowa's NASA mission, TRACERS, successfully launched into orbit, marking a significant milestone in space ...

Astronomers using the Subaru Telescope and Canada France Hawaii Telescope on Mauna Kea discovered a “fossil” of our early ...

Nearly a month ago, a mysterious object was seen hurtling through the solar system and later confirmed as an interstellar ...

Aliens are visiting our solar system. Not little green men, sadly, but natural alien objects—cosmic bodies such as comets and ...

The newly released images from a December flyby are so detailed that scientists can see explosions and the flow of solar winds.

An icy object in perfect sync with Neptune reveals new details about planetary migration and unseen bodies far beyond the Kuiper Belt.