Through the early 1900s, astronomers disagreed on whether the universe was home to a multitude of galaxies, so-called “island universes,” or contained entirely within the boundaries of the ...

Every constellation has something within its borders worth tracking down, if you just look hard enough. Here are five to ...

Sixth test flight of the largest rocket to ever fly will feature another attempt at catching the Super Heavy booster and ...

November’s major meteor shower ramps up as the Moon reaches perigee shortly before its Full phase in the sky this week.

Rainbows may be a trick of the eye, but they’re also based in fascinating optical physics. Here's how they work and why we ...

NASA has identified nine locations near the Moon’s south pole for the first crewed lunar landing since Apollo 17.

As the ISS ages and is eventually decommissioned, private companies may operate the orbital platforms of the future.

Insulation provided by carbon dioxide ice above the martian polar caps could explain many of the Red Planet’s ancient river features.

Mars’ features are starting to become visible, Mercury appears in the evening sky, and the Trifid Nebula glows in the sky ...

Astronauts have voted from the space station since 1997 and have cast ballots in nearly every U.S. presidential election ...

When the historic observatory was shuttered by the University of Chicago, a community organization helped to revitalize it.