Supernova - Wikipedia
网页A supernova (pl.: supernovae or supernovas) 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 (2021) Stream and Watch Online - Moviefone
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A nova explosion may soon be visible in the night sky. Here’s ... - PBS
网页2024年8月24日 · Very massive stars – those more than eight times the mass of our Sun – explode in dramatic supernova explosions, like the ones people observed in 1054 and 1572. In lower mass stars, including our...
What Is a Supernova? | NASA Space Place – NASA Science for Kids
网页2024年9月17日 · A supernova is the biggest explosion that humans have ever seen. Each blast is the extremely bright, super-powerful explosion of a star.
NASA, Global Astronomers Await Rare Nova Explosion
网页2024年6月6日 · Don’t confuse a nova with a supernova, a final, titanic explosion that destroys some dying stars, Hounsell said. In a nova event, the dwarf star remains intact, sending the accumulated material hurtling into space in a blinding flash.
Supernova | Definition, Types, & Facts | Britannica
网页2024年9月20日 · 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. Supernovae resemble novae in several respects.
Supernovae Information and Facts | National Geographic
网页3 min read. Some stars burn out instead of fading. These stars end their evolutions in massive cosmic explosions known as supernovae. When supernovae explode, they jettison matter into space at...
What is a supernova? | Space
网页2023年6月19日 · A supernova is what happens when a star has reached the end of its life and explodes in a brilliant burst of light. Supernovas can briefly outshine entire galaxies and radiate more energy than...
What is a supernova? - EarthSky
网页2020年11月12日 · A supernova is the name given to the cataclysmic explosion of a massive star at the end of its life. It can emit more energy in a few seconds than our sun will radiate in its lifetime of...
NASA’s Webb Opens New Window on Supernova Science
网页2024年6月10日 · Its progenitor star exploded when the universe was only 1.8 billion years old. It is a so-called core-collapse supernova, an explosion of a massive star.