The Hubble Telescope appears as a tiny silhouette during a perfectly timed solar transit captured from Puerto Rico.

Scientists have identified a strange cosmic relic called Cloud-9 — a starless, gas-filled object dominated by dark matter.

Astrophotographer Efrain Morales captured a rare, fleeting glimpse of the Hubble Space Telescope crossing the sun from Aguadilla, Puerto Rico.

The Virgo cluster, despite being millions of light-years away, closest large galaxy cluster to Earth. The Virgo galaxy ...

Jubilant astronomers today unveiled humankind’s most spectacular views of the universe, as captured by the NASA Hubble Space Telescope’s new Advanced Camera for Surveys (ACS). They also reported that ...

NASA's Hubble Telescope captured something unusual and came up with an accurate nickname. The newly discovered astronomical ...

Astronomers say they have identified a new type of astronomical object that challenges traditional ideas about how galaxies ...

Scientists have theorized that dark matter clumps exist in staggering numbers, far more than the galaxies we see. Only clumps ...

NASA scientists have identified what they describe as the universe's first confirmed example of a starless, gas-rich object ...

Twenty-five years ago this week, NASA held its collective breath as seven astronauts on space shuttle Endeavour caught up with the Hubble Space Telescope 353 miles (568 kilometers) above Earth. Their ...

A high-tech camera the size of a baby grand piano is now on display at the Smithsonian's National Air and Space Museum, drawing admiring looks from scientists and historians who relish the chance to ...