安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Supernova - Wikipedia
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 nuclear fusion
- Supernova | Definition, Types, Facts | Britannica
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 (Latin: “new”), the name for another type of exploding star
- What Is a Supernova? | NASA Space Place – NASA Science for Kids
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 massive star in our Milky Way that died 6,500 light-years away
- 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
- What is a supernova? - EarthSky
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
- 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? The Explosive Death of Stars and Its Cosmic Impact
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, capable of releasing more energy in a single moment than an entire galaxy emits over long periods of time
- What Is a Supernova? - Definition and Astronomical Facts
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
|
|
|