Facts about Supernovae

1. 07

   Iron-peak elements created in supernova explosions comprise roughly half of all iron in the universe, seeding planetary systems with the metal essential for life.

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2. 06

   Supernova remnants like the Crab Nebula, observed by Chinese astronomers in 1054 CE, expand at speeds of 1,500 kilometers per second and continue brightening radio telescopes today.

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3. 05

   Type II supernovae occur when massive stars exceed 8 solar masses and collapse, ejecting material at velocities exceeding 30,000 kilometers per second into surrounding space.

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4. 04

   Radioactive nickel-56 decay powers the light curves of Type Ia supernovae, releasing energy that peaks roughly 19 days after the explosion.

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5. 03

   Neutron stars left behind by supernovae can spin up to 716 times per second, becoming millisecond pulsars detectable across billions of light-years.

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6. 02

   A single supernova explosion releases more energy in seconds than our Sun will emit over its entire 10-billion-year lifetime.

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7. 01

   The brightest supernova ever recorded, SN 1006, reached magnitude -7.5 in 1006 CE and remained visible in daylight for weeks.

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