Voyager 1 is about to cross a threshold that sounds almost mythical: within about a year, the spacecraft will be a full light ...

Despite their liquid water and potential for habitability, these moons are very different environments from Earth. On Earth, ...

Look to the southeastern horizon in the hours following sunset on Nov. 29 — you'll be able to see the moon shine close to the ...

Eight distant worlds hold secrets that still puzzle scientists and spark endless curiosity. Each moon offers a strange allure ...

Launched with 1970s technology, the Voyager probes were sent on a path through the seemingly deadly asteroid belt and past ...

NASA’s Voyager 1 space probe will continue its almost half-century of service by delivering yet another milestone.

That remains just one of the many achievements in Voyager 1’s illustrious resume, the spacecraft currently 15.79 billion ...

Voyager 1 one light-day from Earth marks a historic 24-hour signal delay, revealing the future of deep space communication ...

NASA's spacecraft is about to become the first human-made object to reach a distance of one light day from Earth.

It takes light a single day to travel 16 billion miles. The Voyager 1 probe will need a little longer, just 49 years.

This means that it would still take a little over four whole years of traveling at lightspeed to reach the red dwarf—not that ...

About 400 years ago, astronomers observing Saturn through telescopes were baffled when its rings seemed to vanish.