A supernova (pl.: supernovae) is a powerful and luminous explosion of a star. A supernova occurs during the last evolutionary stages of a massive star, or when a white dwarf is triggered into runaway …

4 days ago · The combination of a supernova and a kilonova may have produced a rare space explosion that astronomers have never seen before

Dec 7, 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 …

Sep 25, 2025 · A supernova of a star more than about 10 times the size of our sun may leave behind the densest objects in the universe— black holes. The Crab Nebula is the leftover, or remnant, of a …

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 …

Jun 19, 2023 · A supernova is what happens when a star has reached the end of its life and explodes in a brilliant burst 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.

Dec 13, 2025 · The James Webb Space Telescope (JWST) identified the earliest known supernova, occurring 730 million years after the Big Bang, by following up on the gamma-ray burst GRB …

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 …

4 days ago · A massive star explodes in a supernova, collapsing into a stellar core that forms two neutron stars. The neutron stars spiral together and merge, sending gravitational waves rippling …