A warning system for when stars go supernova

In Oblivion, humanity is attempting to recover from a narrowly won war with an alien species. We survived, but the planet is wrecked and the only hope — at least according to the authorities — is to leave Earth behind. As the movie opens, that’s what we think is happening. In truth, the conflict is ongoing. The space station ferrying humanity off-world is actually an alien craft stealing the last of humanity’s resources before they leave.
Scientists have devised a supernova warning system, a way of detecting supernovae before they happen.

Why Do Stars Explode? Museum of Science, Boston

Astronomers Think They Have a Warning Sign for When Massive Stars are About to Explode as Supernovae - Universe Today

Cassiopeia A: The Surprise Inside an Exploding Star - ABC News

Supernova warning system could alert the world to exploding stars, scientists say

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Scientists are keep watch in case Betelgeuse explodes as a supernova

The Supernova Early Warning System

James Webb Space Telescope captures star going supernova in a dazzling cloud of dust

Astronomers develop early warning system for supernova

Supernovae Information and Facts

If Betelgeuse goes boom: How DUNE would respond to a nearby supernova