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 …

5 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.

4 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.

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.

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 …

Supernova explosions are spectacular exceptions to that rule. Several different pathways can lead to a supernova explosion, one of which is the death of a supermassive star.

Sep 15, 2025 · A supernova is a powerful and catastrophic event that occurs when a star explodes, releasing an immense amount of energy into space. This explosion can briefly outshine an entire …

Supernovas are some of the brightest events in the universe, occasionally outshining entire galaxies at their peak. Many supernovas can be seen from billions of light-years away, and nearby supernovas …