The pair of galaxies NGC 1531/2, engaged in a spirited waltz, is located about 70 million light-years away toward the southern constellation Eridanus (The River). R. Gendler and J.E. Ovaldsen/ESO/IDA hide caption

toggle caption R. Gendler and J.E. Ovaldsen/ESO/IDA

Does The Size Of Space Freak You Out?

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NGC 3597, seen in this Hubble Space Telescope image, is the product of a collision between two good-sized galaxies, and is slowly evolving to become a giant elliptical galaxy. ESA/NASA hide caption

toggle caption ESA/NASA