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 …

Apr 27, 2026 · 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 …

Apr 13, 2026 · 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 …

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.

Mar 5, 2026 · During a supernova, temperatures and pressures become so extreme that nuclear reactions produce elements heavier than iron. This process, known as rapid neutron capture or the r …

Nov 12, 2020 · A supernova is a star's colossal explosion at the end of its life, which can outshine its entire galaxy. Read about causes and types of supernovae here.

Here you will find a list of the supernovae we can see right now, as well as information about where they are in the sky, images of that object and how bright the explosion was at the last time we measured …

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.

Apr 26, 2024 · A supernova creates a huge amount of light for a short amount of time. Astronomers hoping to study such fleeting events look for points of light that suddenly appear in the night sky.

5 days ago · A rare supernova appearing five times in the sky is offering a powerful new way to measure the universe’s expansion.