In the Integration Facility at the Baikonur Cosmodrome in Kazakhstan, Expedition 48-49 crewmembers (left to right) Kate Rubins of NASA, Anatoly Ivanishin of Roscosmos and Takuya Onishi of the Japan Aerospace Exploration Agency prepared for a four-month mission on the International Space Station in this June 2016 photo. Alexander Vysotsky/NASA hide caption

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Alexander Vysotsky/NASA

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

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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

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