GS-z13-1, marks the earliest sign yet spotted of the era of cosmic reionization at 330 million years after the Big Bang.

The planets offer exciting views in April for both night owls and early risers. Plus, the Lyrid meteor shower peaks in ...

I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes in the ...

Ganymede, Jupiter's largest moon and the solar system's largest, is bigger than Mercury and the dwarf planet Pluto, with a diameter of 5,268 kilometers.

A century ago, Edwin Hubble revolutionized our understanding of the universe by proving that the Milky Way is just one of ...

On March 29, skywatchers across parts of the Northern Hemisphere will be treated to a rare astronomical double feature: a ...

Plus: A solar eclipse and an occultation of the Pleiades as our satellite skims through several constellations in the sky ...