In 1974, astronomers sent a call out into the cosmos from a massive telescope in Puerto Rico. The anniversary of the message brings reflections on a new missive to the stars and grief for a lost ...

A group of international astronomers have discovered three mysterious, ultra-massive galaxies in the early universe. The galaxies – systems of stars, gas, dust, and dark matter – appear in a view from ...

The James Webb telescope has spotted three gigantic "red monster" galaxies that were spawned soon after the Big Bang. They're ...

NASA's Nancy Grace Roman Space Telescope is one giant step closer to unlocking the mysteries of the universe. The mission has ...

Fly about 2,600 light-years to Hubble Space Telescope imagery of the Cygnus loop nebula. See images from 2001 and 2020.

Roughly 400,000 years after the Big Bang, the universe cooled just enough to allow photons to escape from the primordial ...

The James Webb Telescope once again discovered galaxies that form stars so early and so effectively that they don't fit into ...

The galaxies, each as vast as the Milky Way, are baffling because most scientific models for galaxy evolution suggest ...

NASA’s Voyager 2 flyby of Uranus decades ago shaped scientists’ understanding of the planet but also introduced unexplained oddities. A recent data dive has offered answers. In 1986, Voyager 2's flyby ...

Webb captures merging galaxy pairs known as II ZW 96. It is located around 500 million light-years away from Earth.

James Webb Space Telescope, NASA's latest and most advanced space observatory, has continued to capture breathtaking images ...