The interstellar comet 3I/ATLAS reaches its closest point to Earth on Dec. 19, allowing close study with no threat to the planet.

With one of NASA's most data-rich Martian orbiters of the 21st century in distress, now is as good a time as ever to remember ...

Scientists are preparing for their best look at it yet.

NASA has lost contact with its MAVEN spacecraft that launched from Florida and has been orbiting Mars for more than a decade.

In theory, leaner NASA oversight, greater use of off‑the‑shelf hardware and narrower science goals can cut costs while ...

NASA scientists are working to regain contact with a spacecraft that has orbited Mars for more than a decade. The space ...

NASA is probing a sudden loss of contact with its MAVEN Mars orbiter after rare 3I/ATLAS data, raising questions about timing ...

NASA has lost contact with its MAVEN spacecraft that has been orbiting Mars for more than a decade. Here's what we know.