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 …

Mar 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 …

Mar 21, 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 …

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

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.

3 days ago · Watch the moment a star explodes in a supernova — something scientists have never directly witnessed like this before. The footage captures the early stages of the explosion, offering a …

Mar 30, 2025 · When certain stars die, they do not simply fade away. They explode. This tremendous stellar explosion is known as a supernova. It is one of the most powerful phenomena in the universe, …

5 days ago · A Type 1 supernova (officially written Type I) is a stellar explosion that lacks hydrogen in its light signature. The most famous and scientifically important subtype, Type Ia, occurs when a dense …

What is a supernova and how does it look? Discover the key characteristics of supernovae, their origin, lifecycle duration, and what happens after supernovae die.

3 days ago · NASA's IXPE (Imaging X-ray Polarimetry Explorer) mission has taken a new observation of a supernova, RCW 86, helping fill in a fuller picture of what other telescopes have observed.