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What If Earth Were Sucked Into a Black Hole?
What will happen when a black hole hits Earth? - Big Think
What's the blast radius of a supernova?
How Close Would a Supernova Have to Be to Kill Us All?
What's a safe distance from a supernova for Earth?
From Harvard-Smithsonian Center for Astrophysics via EarthSky
Huge, unusually powerful supernova explosion in space detected by
From EarthSky: “What's a safe distance between us and a supernova
15 Unbelievable Facts About Supernovae
ESO Supernova Exhibition — How dangerous are supernova explosions?
What's a safe distance from a supernova for Earth?
Near-Earth supernova - Wikipedia
Betelgeuse went dark, but didn't go supernova. What happened?
Using supernovae to measure distances
civilization - How can we extinguish a supernova? - Worldbuilding