Supernovae can expel several solar masses of material at speeds up to several percent of the speed of light. This drives an expanding shock wave into the surrounding interstellar medium, sweeping up an …

Dec 24, 2025 · supernova, any of a class of violently exploding stars whose luminosity after eruption suddenly increases many millions of times its normal level. The term supernova is derived from nova …

1 day ago · In a new video, astronomers have compiled 25 years' worth of observations of the remnant of Kepler's Supernova, or SN 1604, revealing the astonishing changes visible even over such a short …

3 days ago · A new video shows the evolution of Kepler’s Supernova Remnant using data from NASA’s Chandra X-ray Observatory captured over more than two and a half decades.

What is a supernova? Learn how massive stars explode, the types of supernovae, and the famous cosmic events captured by astronomers.

Dec 28, 2025 · Most distant supernova: James Webb sees a star explode at cosmic dawn JWST has revealed a stellar explosion from the universe’s childhood, and it looks astonishingly familiar. Date: …

Oct 3, 2025 · What is a supernova explained simply? Learn how stars explode, the types of supernovae, what they leave behind, and the most famous supernovae in history.

2 days ago · Decades in the making, NASA's X-ray timelapse shows a stellar explosion expanding into space at up to 2% the speed of light.

A supernova can light the sky up for weeks, and the massive transfer of matter and energy leaves behind a very different star.

Mar 30, 2025 · A supernova is not just a star’s death—it is a dramatic event that reshapes the cosmos. These cosmic explosions are responsible for creating the elements that make up the Earth and life …