Cosmology is puzzled as to why two methods for measuring the expansion of the cosmos yield different results. A third method ...

That the universe is expanding has been known for almost a hundred years now, but how fast? The exact rate of that expansion ...

NASA’s James Webb Space Telescope captured the first published detection of a supernova progenitor in galaxy NGC 1637, revealing a red supergiant star before explosion.

The Hubble Space Telescope captured imagery of supernova 2018 GV from 2018-2019. It was seen in barred spiral galaxy NGC 2525 ...

A proposed five-satellite Cosmic Positioning System could measure cosmic distances directly and help address discrepancies in the Hubble constant through solar system–scale triangulation.

The powerful gravity of a galaxy embedded in a massive cluster of galaxies in this Hubble Space Telescope photo is producing multiple images of a single distant supernova far behind it. Both the ...

A deep space photographer spent months photographing the Crab Nebula and found his composite image, when compared with the 1999 image from the Hubble Space Telescope, shows the supernova's expansion.

One of the most stubborn issues in cosmology today concerns the universe's rate of expansion. Scientists know it's expanding, but defining the rate of that expansion is challenging. The rate of ...

"Thanks to the high resolution of our new images, we detected a faint structure on the northeast side of this supernova remnant that had not been observed before." When you purchase through links on ...

Several telescopes used to observe the supernova SN Zwicky which was magnified nearly 25 times by a foreground galaxy acting ...