Image credits

Every picture here is public domain or CC0, and every one is served from our own server. None of them legally needs a credit. They get one anyway, because somebody made them, and in a few cases that somebody was engraving copper in 1660.

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  Moonrise under the Woodrow Wilson Bridge

  NASA/Bill Ingalls. Public domain (NASA media). Source
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  Planisphaerium Arateum, Harmonia Macrocosmica (1660)

  Andreas Cellarius. Public domain. Source
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  Planispheric Astrolabe (1654 to 1655)

  Muhammad Zaman al-Munajjim al-Asturlabi; The Metropolitan Museum of Art. CC0 1.0. Source
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  June, Les Très Riches Heures du duc de Berry

  Limbourg brothers. Public domain. Source
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  Moonrise over Earth's limb, Expedition 34

  NASA. Public domain (NASA media). Source
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  The Freeman's Almanack (1823), page 13

  Samuel Burr. Public domain. Source
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  Fred Lawrence Whipple Observatory, Mt Hopkins

  NASA Ames/John Schultz. Public domain (NASA media). Source
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  Caroline Herschel, Women Worth Emulating (1877)

  Clara L. Balfour. Public domain. Source
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  Scenographia Compagis Mundanae Brahea, Harmonia Macrocosmica (1660)

  Andreas Cellarius. Public domain. Source
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  The Ptolemaic system, Harmonia Macrocosmica (1660)

  Andreas Cellarius; Jan van Loon (engraver). Public domain. Source
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  IBM card storage

  U.S. National Archives and Records Administration. Public domain. Source
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  IBM 1401 data processing system at Ames

  NASA. Public domain (NASA media). Source
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  Some of the Principal Inhabitants of the Moon (1836)

  The Metropolitan Museum of Art. CC0 1.0. Source
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  From orbit, looking toward Mercury's horizon

  NASA/JHUAPL/Carnegie Institution of Washington. Public domain (NASA media). Source
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  Jupiter with satellites Io and Europa

  NASA/JPL. Public domain (NASA media). Source
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  Dunhuang star chart

  Unknown (Tang dynasty), British Library. Public domain. Source
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  Mandala of Surya, the Sun God (16th century, Nepal)

  Unknown artist; Walters Art Museum, Baltimore. CC0 1.0. Source
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  Tree of Life, Oedipus Aegyptiacus (1652)

  Athanasius Kircher. Public domain. Source
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  The Freeman's Almanack (1823), page 48

  Samuel Burr. Public domain. Source
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  Planisphaerium Braheum, Harmonia Macrocosmica (1660)

  Andreas Cellarius. Public domain. Source
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  Curb market at Broad Street (1902)

  Falk. Public domain. Source
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  Scenographia Systematis Copernicani, Harmonia Macrocosmica (1660)

  Andreas Cellarius. Public domain. Source
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  Theoria Lunae, Harmonia Macrocosmica (1660)

  Andreas Cellarius. Public domain. Source
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  Sea oats and the Milky Way, Atlantic shoreline

  NASA/Glenn Benson. Public domain (NASA media). Source
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  Moon Phase and Libration, 2023 (the eight moon phases on Today and in the weekly email)

  NASA's Scientific Visualization Studio/Ernie Wright. Public domain (NASA media). Source