The universe

A celestial light show illuminates a distant spiral galaxy, where a hidden supernova briefly outshines its stellar neighbors in a new image from the Hubble Space Telescope.

A fresh analysis of decades-old X-ray black hole jet data has revealed bright, lumpy features with mysterious speed changes.

An old galaxy reveals clusters of young stars that have formed in an unusually synchronized fashion, challenging the idea that star formation declines as galaxies age.

The neutron star 4U 1820-30 is one of the fastest spinning bodies in the universe, spinning at 716 times a second and erupting like an atomic bomb, NASA's NICER telescope has found.

Mars' global magnetic field may have hung around for 200 million years longer than scientists had thought, possibly giving life a longer window to take hold on the Red Planet.

We live in a golden age for learning about the universe. Our most powerful telescopes have revealed that the cosmos is surprisingly simple on the largest visible scales.

Black hole formation could be a little Big Bang in reverse, coupling the matter of a dying star with dark energy, the mysterious force driving the accelerating expansion of the universe.

Astronomers have used a range of telescopes, including Hubble, to watch as particles dance around a neutron star collision that created the smallest black hole ever seen.

Valencia was particularly hard-hit.

The sun erupted with an X-class solar flare on Halloween, and solar activity is expected to remain high through Nov. 3.