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On this day in space! Sept. 11, 1985: The International Cometary Explorer makes 1st comet flyby in history for NASA and Europe
On Sept. 11, 1985, the International Cometary Explorer, or "ICE," became the first spacecraft to fly by a comet. Here's why it mattered.
Wavy alien dune fields stretch across Mars | Space photo of the day for Sept. 11, 2026
A dune field on Mars, as seen by the Mars Reconnaissance Orbiter.
2 private spacecraft zoom within 650 feet of each other to showcase 'advanced capabilities' in orbit (photos)
Two spacecraft operated by the company Impulse Space pulled off an impressive orbital feat recently, coming within less than 650 feet of each other.
25 years ago, a NASA astronaut witnessed the tragic 9/11 attacks from space. Here's what he saw.
NASA astronaut Frank Culbertson saw the immediate aftermath of the 9/11 attacks from the International Space Station in 2001. His view and his reaction were captured on video.
'I take the compact Nikon Stabilized 12x25 binoculars with me everywhere' — they now have $73 off, the best we've seen this year
Deals Our best compact image-stabilized binoculars, the Nikon Stabilized 12x25 binoculars, just dropped to the lowest price we've seen since Black Friday. Now available for $626.95.
Scientists discover mysterious new X-ray objects 'unlike any they have seen before'
Faint in X-rays but bright in ultraviolet light, new objects found by NASA's Chandra space telescope could help solve two great astrophysical mysteries.
The Summer Triangle — 3 stars, 1 seasonal mystery
The Summer Triangle dominates the night sky long after summer begins to fade. So what makes Vega, Altair and Deneb a distinctly summer sight?
On this day in space! Sept. 10, 2011: NASA launches GRAIL probes to the moon to map lumpy lunar gravity
On Sept. 10, 2011, NASA's GRAIL spacecraft launched on a mission to the moon! Here's why the moon gravity mapping mission mattered.
