Supernova - Wikipedia
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, …
Supernova | Definition, Types, & Facts | Britannica
Oct 11, 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 …
Early views of a supernova’s first moments reveal a lopsided blast
4 days ago · Some of the earliest images ever taken in the wake of massive star’s death give astronomers important clues about what triggers a supernova.
What Is a Supernova? | NASA Space Place – NASA Science for Kids
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 …
What Is a Supernova: Types, Facts, and Famous Explosions
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.
What Is a Supernova? Definition, Types, and Famous Examples
What is a supernova? Learn how massive stars explode, the types of supernovae, and the famous cosmic events captured by astronomers.
Astronomers Unveil the Surprising Hidden Geometry of a Supernova
9 hours ago · Astronomers have, for the first time, recorded the moment a star’s explosion broke through its surface. The nearby supernova, SN 2024ggi, revealed a surprisingly olive-shaped …
For first time, scientists see the very early stages of a supernova
4 days ago · The explosive death of a star - a supernova - is among the most violent cosmic events, but precisely how this cataclysm looks as it unfolds has remained mysterious. …
What is a Supernova? Exploring the Explosive Death of Stars and …
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 …
Supernovas & Remnants - Harvard–Smithsonian Center for …
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 …
Supernovae Information and Facts - National Geographic
A supernova can light the sky up for weeks, and the massive transfer of matter and energy leaves behind a very different star.
What is a supernova? - EarthSky
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.
What is a Supernova? Definition, Causes, Types of Supernova …
Dec 23, 2024 · If a very nearby star goes supernova, it can genetically alter or possibly even destroy life on Earth. Even a fairly distant one often leaves visible wreckage that makes us …
Supernova - Definition & Detailed Explanation - Astronomical …
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 …
Supernova - ESA/Hubble
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.
What Is a Supernova? - Space
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.
DOE Explains...Supernovae - Department of Energy
Supernovae are thus essential to life. After a core collapse supernova, all that remains is a dense core and hot gas called a nebula. When stars are especially large, the core collapses into a …
What Is a Supernova? One of the Universe's Biggest Spectacles ...
Apr 25, 2025 · Before the invention of the telescope, Western astronomers used stella nova to refer to the appearance of such a temporary new star. Today, we know them to be not stars …
What is a Supernova? The Spectacular Death of a Star.
Dec 18, 2024 · A supernova is the explosive death of a large star, releasing immense energy and spreading elements vital for new stars, planets, and life across the universe.
For first time, scientists see the very early stages of a supernova
By Will Dunham WASHINGTON (Reuters) -The explosive death of a star - a supernova - is among the most violent cosmic events, but precisely how this cataclysm looks as it unfolds …
Supernovae - Imagine the Universe!
Sep 23, 2021 · A supernova explosion will occur when there is no longer enough fuel for the fusion process in the core of the star to create an outward pressure which combats the inward …
Type Ia supernova - Wikipedia
A Type Ia supernova (read: "type one-A") is a supernova that occurs in binary systems (two stars orbiting one another) in which one of the stars is a white dwarf. The other star can be anything …
If the supernova standard candle is wrong, it could solve the …
2 days ago · If the supernova standard candle is wrong, it could solve the Hubble tension by Brian Koberlein, Universe Today edited by Sadie Harley, reviewed by Robert Egan Editors' notes
Supernova - NASA
Nov 5, 2015 · One of the most energetic explosive events known is a supernova. These occur at the end of a star's lifetime, when its nuclear fuel is exhausted and it is no longer supported by …