It's the year 2000. We're floating in space, and we come across the side view of a spectacular spiralgalaxy. It's called UGC 10043 and is located 150 million light-years away. Spiralgalaxies ...
The night sky has always played a crucial role in navigation, from early ocean crossings to modern GPS. Besides stars, the United States Navy uses quasars as beacons. Quasars are distant galaxies with ...
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