In the leading model of cosmology, most of the universe is invisible: a combined 95% is made of dark matter and dark energy.

See a stunning supermoon take flight on Dec. 4.

Skygazers will be able to spot the Orion constellation in the Northern Hemisphere’s southern sky by 9 p.m. tonight ...

The Geminids meteor shower, linked to the 3200 Phaethon asteroid, is set to peak around mid-December. Around 120 meteors will ...

"It’s kind of a jigsaw puzzle where all the different pieces are moving." ...

Chile’s Atacama Desert is one of the darkest spots on Earth, a crown jewel for astronomers who flock to study the origins of ...

For 19-year-old Gael Gomez, the Mount Pleasant Sidewalk Astronomers has changed his life for the better. But soon, he may be ...

It's time for the Geminid meteor shower, one of the strongest of the year. The Geminids peak this weekend and are visible ...

I/Atlas is back in the viral spotlight on social media, with people flabbergasted by its speed. A new post on social media ...

Researchers have found a razor-thin, rotating string of galaxies inside a massive cosmic filament, revealing unexpected ...

The Geminid meteor shower will hit its peak the night of Saturday, Dec. 13, and continue into the morning hours of Sunday, ...

We’ve been receiving calls into the WTOP Newsroom reporting phenomena in the skies that people can’t explain — but our space expert can.