October 23, 1995
You are a way for the cosmos to know itself, Carl Sagan once said. On your birthday, the cosmos got to know itself a little better.
Gamma-Ray Quasars
Birthday · October 23, 1995
A little universe, just for you
Your date.
Ready to give.
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APOD published October 23, 1995. Full image credits are on the original APOD entry below. A publication-date match, not a photo taken on your date. Independent of NASA.
Gamma rays are more than 10,000 times more energetic than visible light.