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 ...

As the sun slips below the horizon and the stars begin to emerge above Carpinteria State Beach Park, another kind of campfire ...

Now it’s official: The Santa Barbara Astronomical Unit (SBAU) is one of the world’s best astronomy clubs, for the July issue of Astronomy Magazine honored the SBAU with the “Out of This World” Award ...

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 ...

If you guessed the astronomical unit, you are correct. The au — the rough distance between the Earth and the Sun — was previously determined by a confusing calculation (“the radius of an unperturbed ...