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In 23 billion years, these two white dwarf stars will collide. Then, they'll explore. Here's why scientists say this ...

Just 150 light years away from us, two white dwarf stars are hurtling towards a gigantic explosion. It is inevitable, but also far in the future.

When their end comes, the stars will explode in a blast making them around 200,000 times brighter than Jupiter does now.

If it exploded today, this future supernova might be close enough to us to pose a threat, but the Sun will have burned out before it happens.

These explosions happen when a white dwarf, which is already an ultra-dense star remnant, takes in too much mass.