What If You Watched a Sunset on Every Planet?

What If: Science, Theory, and Possibilities · Aug 6, 2026 · 5m

You see, there are 2 trillion galaxies out there in the Universe. Within them, there are trillions of stars. The Universe is a strange place, and the view is about to get spectacular. So buckle up. We are traveling from Mercury to the edge of the known Universe, to witness the most beautiful, and deadly, alien sunsets you've ever seen.

Ever wondered what would actually happen? Explore our biggest What If scenarios and go deeper with the What If community.

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