The International Astronomical Union voted Thursday encouraging space organizations across the globe to collaborate on a timekeeping standard for the moon, where one day lasts 29.5 Earth days.

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The International Astronomical Union recognized 128 newly discovered moons orbiting the ringed planet. By Laura Baisas. Published Mar 12, 2025 10:00 AM EDT. As of March 2025, Saturn has 274 known ...

An analysis of the International Astronomical Union’s (IAU) database has also revealed that only 32 (2%) out of 1,578 known Moon craters bear a woman’s name.

There’s a new frozen oddball orbiting the Sun, and it’s not your average space rock. It’s a planet—a minor one, to be fair—but one of the largest yet discovered and with an orbit around the Sun that ...

The International Astronomical Union reclassified Pluto as a dwarf planet because it does not clear its orbit of other debris. Pluto was the little planet that could — until it couldn’t.

THE triennial conference of the International Astronomical Union, representing 27 countries, will be held at Stockholm during the week August 3–10 under the presidency of Prof. E. Esclangon ...

On Aug. 24, 2006, the International Astronomical Union voted to downgrade Pluto to a dwarf planet, causing controversy both scientifically and culturally.