Determining the expansion rate of the universe, the "Hubble constant," shapes our understanding of the cosmos, its age, and its fate.

A dying star is throwing a cosmic tantrum in this combined image from NASA's Spitzer Space Telescope and the Galaxy Evolution Explorer (GALEX), which NASA has lent to the California Institute of ...

A new composite image of the Crab Nebula features X-rays from Chandra (blue and white), optical data from Hubble (purple), ...

The Hubble Space Telescope time-lapse captured footage of Jupiter, Saturn, Uranus and Neptune. Credit: SCIENCE: NASA, ESA, ...

The Hubble Space Telescope has captured an amazing view of galaxies LEDA 48062 and UGC 8603. Credit: ESA/Hubble & NASA, R.

Brian Greene (Cosmic String Theory) and Astrophysicist Ethan Siegel have collaborated on a National Geographic coffee-table ...

New images show the rapidly rotating pulsar of the "Guitar Nebula" shooting out a gigantic cosmic plume of plasma, X-rays and ...

This Hubble image, captured with the Wide Field Camera 3, shows NGC 1866, a star cluster made up of hundreds of thousands of stars bound by gravity. The image shows two massive stars, WR 25 and ...

The infrared-light image captured by the JWST's MIRI (Mid-Infrared Instrument) reveals the galaxy in a totally different way ...

The James Webb Telescope took the deepest and clearest picture of faraway space. Its first picture shows a group of galaxies ...