Every photon that warms skin, powers a solar panel, or triggers a satellite sensor left the Sun roughly eight minutes and ...

One of the stalwart units of astronomy just got a makeover. The International Astronomical Union, the authority on astronomical constants, has voted unanimously to redefine the astronomical unit, the ...

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 International Astronomical Union drops the mic. How far away from Earth is the sun? Not just, you know, very, very far, but in terms of an actual, measurable distance? When you're calculating, how ...

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) — ...

When it comes to dealing with the cosmos, we humans like to couch things in familiar terms. When examining exoplanets, we classify them based on their similarities to the planets in our own Solar ...