Supernova - Wikipedia
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 | Definition, Types, & Facts | Britannica
2024年11月14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
These stars end their evolutions in massive cosmic explosions known as supernovae. When supernovae explode, they jettison matter into space at some 9,000 to 25,000 miles (15,000 to 40,000...
What Is a Supernova? | NASA Space Place – NASA Science for Kids
2024年12月5日 · One type of supernova is caused by the “last hurrah” of a dying massive star. This happens when a star at least five times the mass of our sun goes out with a fantastic bang! Massive stars burn huge amounts of nuclear fuel at their cores, or centers. This produces tons of energy, so the center gets very hot.
The different types of supernovae explained - Astronomy Magazine
2023年11月8日 · These celestial fireworks are known as supernovae, and they serve as the universe’s most striking reminders of the cycle of stellar life. But not all supernovae are created equal. Differences...
What is a supernova? | Space
2023年6月19日 · A supernova is the explosion of a massive star. There are many different types of supernovae, but they can be broadly separated into two main types: thermonuclear runaway or core-collapse.
DOE Explains...Supernovae | Department of Energy
Supernovae are considered one of the original sources of the elements heavier than iron in the Universe. Even the iron in your blood can be traced back to supernovae or similar cosmic explosions from long before our Sun had formed. Supernovae are thus essential to life.