If you use a telescope to see a star on the far side of the galaxy, you’re actually seeing what the star looked like 100,000 years ago, since the light that left the star then is just reaching us now.

"If you use a telescope to see a star on the far side of the galaxy, you’re actually seeing what the star looked like 100,000 years ago, since the light that left the star then is just reaching us now."

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