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 1, 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 …

10 hours ago · Astronomers Witnessed the Birth of a Magnetar for the First Time. It Explains the Mysterious Flickering of an Ultra-Bright Supernova New research suggests that the highly …

A supernova is the explosive death of a star, releasing more energy in a few weeks than our Sun will produce over its entire 10-billion-year lifetime. At peak brightness, a single supernova can match the …

Jan 20, 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 …

1 day ago · Astronomers have discovered that the birth of neutron stars with magnetic fields trillions of times stronger than Earth's magnetosphere is the "magic trick" behind superbright supernovas.

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

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.

2 days ago · A new study explains how some supernovae are particularly dazzling—the glow from a magnetic, spinning ball of neutrons called a magnetar. An assist from Einstein is what settled the case

2 days ago · Oscillations in the brightness of a ‘superluminous’ supernova reveal it to be powered by a magnetized neutron star that distorts the orbit of surrounding gas.