In the first fractions of a second after the Big Bang, the universe ballooned outward at a speed that still defies explanation, stretching space itself before stars or even atoms had a chance to form.

The unmatched sensitivity of the NASA/ESA/CSA James Webb Space Telescope in both near- and mid-infrared light sheds new light on PMR 1, a little-studied nebula in the constellation of Vela.

NASA's new infrared telescope named "SPHEREx" has officially opened its eyes to the cosmos.

The 1998 discovery that the universe is expanding at an accelerated rate raised new and profound questions about the nature and fate of the universe. Based on measurements of the speed of distant ...

Two heads are better than one in the latest images from NASA's James Webb Space Telescope, which reveal new detail in a mysterious, little-studied nebula surrounding a dying star.

The 3I/ATLAS comet is only the third object ever identified as entering our solar system from elsewhere in the galaxy. While it poses no threat to Earth and will get no closer than 170 million miles ...