The astronomical discoveries of the 1600s—such as Saturn’s rings—prompted new questions about the structure of the cosmos and humans’ place in it.

IceCube scientists have detected high-energy tau neutrinos from deep space, suggesting that neutrino transformations occur not only in lab experiments but also over cosmic distances.

Observations of an enormous cosmic structure, dubbed the "Big Ring," seem to violate the Copernican principle.

In 1924, Edwin Hubble found proof that the Milky Way isn't the only galaxy in the Universe.

Scholars sometimes credit Thales or Empedocles of Acragas with the first correct theory of solar eclipses, but it was Anaxagoras who had the science right.

Bang bang all over the Universe.

This oddball system of three stars might be our best chance at finding nearby life in the Universe.

Asteroid collisions aren't always bad.

Many impact craters on Earth have been erased thanks to wind, water, and plate tectonics. But scientists have clever ways to find them.

The outer planets’ clouds hide the weirdness within.