A quick look at a map of the Arctic highlights the strategic importance of Greenland to the United States and to NATO and ...

Unpredictable bursts of light are pulsing from the debris surrounding Sagittarius A*, offering new insights into the ...

A rare full seven-planet alignment will be visible in the early night sky between Feb. 22 and 28. We have the tips you need ...

The military keeps in-flight details on the X-37B relatively quiet. A new photo gives the first look at what the view is from ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

Scientists in China have achieved a breakthrough in imaging technology that could be a game changer for surveillance systems.

A recent study has unveiled how chemical elements and powerful winds shape the atmosphere of a planet far beyond our solar system.

NASA's Landsat 8 satellite snapped a stunning top-down view of an "unusually spectacular" Mount Etna eruption. Infrared data makes the volcano's lava river really pop.

A breathtaking new image of the RCW 38 star cluster showcases a cosmic nursery bursting with color, light, and energy.

London is seen from the ISS via Sen’s onboard 4k cameras. (Credit: Sen) ...

NASA and other space agencies are attempting to come up with a way to destroy a massive asteroid unlikely to strike Earth.