For the first time, NASA Chandra X-ray telescope has been used to discover a pair of black holes in dwarf galaxies that are ...

Space exploration has changed how we look at the universe, but it's costly, and some of the most iconic NASA missions are ...

What is a black hole? Black holes are among the most extreme objects in the universe, forming when a massive star collapses ...

Nature offers many dazzling displays, from jagged flashes of lightning to radiant sunsets. But perhaps one of the most ...

NASA’s Mars rover collected rock samples that could reveal if the planet once hosted life. Here’s what scientists plan to do ...

Jeffrey Kluger's "Gemini" argues that the program was more milestone than stepping stone in the 1960s space race.

The natural world has brewed up a spooky 'skull' in a deep volcanic pit in the Sahara Desert. From space, the sight really ...

A cosmic explosion known as GRB 250702B is by far the longest gamma-ray burst astronomers have ever seen—if it’s even one at ...

In 1990 the Hubble Space Telescope was launched that fundamentally changed our understanding of black holes. Kathryn Sullivan, a NASA astronaut, spoke to Witness History about the telescope that ...

On Easter weekend 1960, members of the Altoona Skin Divers Club were scuba diving in the Tyrone Quarry Hole. The hole was 45 ...