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See light echo from star illuminate nebula

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Case Rosewill Thor

This isn't just a pretty image, though. It's one of many that the Hubble has caught that actually teaches us something new about how our universe works.

We think it's one of the most stunning scientific images we've seen from the telescope because astronomers had to wait nearly two years for it.

That's because before 2002, the only thing we could see in this region was a supergiant star.

But in January 2002, the star, located 20,000 light years from Earth, gave off a blindingly bright pulse of light.

For the brief period of time the pulse lasted, the star was the most luminous star in our galaxy, shining at 600,000 times brighter than our sun.

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