How Quickly Does A Supernova Happen? The Stunning Speed of a Core Collapse Supernova

TL;DR

Our sun will eventually turn into a white dwarf, while stars with more mass will die as supernovas, exploding in an instant.

Transcript

our sun will die a slow sad death billions of years from now when it runs out of magic Sun juice sure it'll be a dramatic red giant for a bit but then it'll settle down as a white dwarf build a picket fence relax on the porch with some refreshing Sun juice lemonade gently drifting into its Twilight years and slowly cooling down until it becomes the... Read More

Key Insights

• 😎 Our sun will eventually turn into a white dwarf and slowly cool down over billions of years.
• 🤩 Stars with more mass than our sun will die as supernovas, exploding in an instant and creating exotic elements.
• 💯 Different types of supernovas exist, with core collapse supernovas being one of them.
• 💯 Supernovas can take a few million years to occur, with the core collapse happening in less than a second.
• 🫢 The shock wave created during a supernova expands outward, creating elements beyond iron on the periodic table.
• 😣 Supernovas can produce as much energy as the rest of their galaxy combined.
• 🙊 The brightness of a supernova can peak in a few months and then gradually fade away over a few years.

Questions & Answers

Q: How does a massive star become a supernova?

Massive stars convert hydrogen into helium through fusion, and once they run out of hydrogen in their cores, they continue fusion with other elements until reaching iron. This leads to the collapse of the star's core, resulting in a supernova explosion.

Q: What elements are created during a supernova?

Supernovas create elements beyond iron on the periodic table, including gold, silver, platinum, and uranium. These elements are formed as the shock wave created by the collapsing core passes through the outer layers of the star.

Q: How long does it take for a star to become a supernova?

It takes a few million years for a massive star to exhaust its core's hydrogen fuel and become a supernova. However, the core collapse itself occurs in less than a quarter of a second.

Q: What is the difference between core collapse supernovas and type 1A supernovas?

Core collapse supernovas occur in massive stars when their cores collapse due to the absence of energy production from fusion. Type 1A supernovas, on the other hand, happen when a white dwarf star accumulates material from a binary partner and reaches 1.4 times the mass of the Sun before exploding.

Summary & Key Takeaways

• Stars convert hydrogen into helium through fusion, releasing tremendous energy that pushes against gravity. Once a massive star exhausts its core's hydrogen fuel, it collapses inward and explodes as a supernova.

• Supernovas create shock waves that propagate outward, creating exotic elements beyond iron on the periodic table, including gold, silver, platinum, and uranium.

• Different types of supernovas exist, including core collapse supernovas and type 1A supernovas, each with different mechanisms and durations.