The Most Extreme Explosion in the Universe
A video on YouTube. In Explainers, a Krater category.
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This video explains what would happen to Earth if a supernova hit us from various distances, concluding that we are currently safe from any nearby threat.
From the video
Answers: What would happen if a supernova hit Earth?
- supernova stages
- effects of supernovae on Earth
- ozone layer destruction by radiation
- local bubble creation
- gamma ray bursts and cosmic rays
What it concludes
- Supernovae thousands of light-years away appear as new stars temporarily and do not harm Earth.
- A supernova 300 light-years away creates a noticeable star in the night sky and a weak wave of cosmic rays.
- A supernova 150 light-years away produces magnetic clouds and high-energy radiation that increases cancer and mutation rates.
- A supernova 100 light-years away severely damages the ozone layer and disrupts climate, potentially triggering an ice age.
- A supernova 25 light-years away is within the kill radius, destroying half the ozone layer and wiping out most surface life and ecosystems.
- A supernova 4 light-years away would bake Earth's surface, burn the atmosphere, and cause the largest extinction event in history, leaving only deep sea life and soil organisms.
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