Click anywhere on this site, and you’ll likely run into a measurement in terms of light-years, solar masses, astronomical units, or arcminutes. These units are unique to astronomy, and all can be ...

The alternative text for this image may have been generated using AI. Without fanfare, astronomers have redefined one of the most important distances in the Solar System. The astronomical unit (au) — ...

The sun still shines as bright, but according to the International Astronomical Union (IAU), its precise distance from us has just changed. At a recent meeting of the IAU in Beijing, China, members ...