Both of Friday’s Astronomical Unit lectures are related to celestial phenomena not discernible to human senses. David ...

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 ...

Appearances aside, the stars are not eternal and the planets do not move with clockwork precision. For these reasons, one astronomer is proposing that his colleagues ditch the astronomical unit, or AU ...

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 ...

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 ...

Amateur astronomers around the world make incredible contributions to science, such as the discovery of the interstellar comet Borisov, but most key jumps in our understanding of the Universe still ...