Artemis II is so perfectly on course that NASA skipped a burn—while the crew gears up for a once-in-a-lifetime view of the ...

On January 22, 2026, interstellar comet 3I/ATLAS will align itself to within an exceptionally small angle with the Earth-Sun axis. At this alignment, the comet will allow the measurement of a novel ...

Comet 3I/ATLAS was expected to come within 130 million miles of the sun on Oct. 30. For the time being, 3I/ATLAS will remain on the opposite side of the sun from Earth, making it impossible to observe ...

As Earth goes out of sight, radio contact with mission control will drop for roughly 40 minutes because the moon itself ...