Latest about Solar System
Astronomers say new interstellar visitor 3I/ATLAS is 'very likely to be the oldest comet we have ever seen'
3I/ATLAS isn't just fascinating because it is the third interstellar visitor found in the solar system; new research suggests it's also the oldest comet ever seen, at over 7 billion years old.
Why scientists are so excited about the newfound interstellar comet 3I/ATLAS (op-ed)
The scientific and cultural impact of 3I/ATLAS over the coming months and years will serve as an exemplar of what astronomy can learn and why it matters.
Did you feel it? Earth just had one of its shortest days ever and 2 more are coming
As Earth spins faster than it has in decades, atomic clocks are catching the difference, and shorter days are on the horizon.
NASA's asteroid-crash Earth defense tactic has a complication — DART ejected large boulders into space
"You can think of it as a cosmic pool game. We might miss the pocket if we don't consider all the variables."
ISS astronaut spies sunglint from Lake Titicaca | Space photo of the day for July 9, 2025
The astronaut was able to capture the lake reflecting direct sunlight at the camera.
See interstellar comet 3I/ATLAS zoom through solar system in new telescope imagery (video)
The European Southern Observatory has captured the clearest images yet of the interstellar visitor 3I/ATLAS as it moves inward through the solar system.
Could NASA's Mars Sample Return be saved? Lockheed Martin proposes $3 billion plan to haul home Red Planet rocks (video)
Lockheed Martin has unveiled a new proposal to take over NASA's beleaguered Mars Sample Return mission for less than half the current cost while achieving key science goals.
NASA teaches Mars orbiter to roll over in quest to find Red Planet water
The spacecraft now almost tips upside down relative to Mars to give its radar the best view.
