Discover how far we can see into the universe, what defines our cosmic horizon, and why some regions remain forever hidden.

New research suggests the universe’s expansion is now decelerating rather than accelerating, challenging dark energy and rewriting cosmic destiny.

Astronomers observed a surprisingly lopsided gas disk around star Gomeisa using a new photonic lantern device, revealing early stellar-formation dynamics.

Astronomers observe new rings developing around icy object Chiron between Saturn and Uranus, offering rare clues about how cosmic rings form.

Astronomers have observed a rogue planet in the Chamaeleon constellation growing at an astonishing rate, shedding new light on planetary formation.