Credits
Acknowledgments
Computation
Software Routines from the IAU SOFA Collection were used. Copyright © International Astronomical Union Standards of Fundamental Astronomy (https://www.iausofa.org/)
Webサイトのバックエンド側で太陽・月の位置や地球の自転などの計算プログラムに使用しています。
Imagery / Data
Earth
The Blue Marble: Land Surface, Ocean Color and Sea Ice
NASA Visible Earth
Base Map with Topography and Bathymetry
NASA Earth Observatory / NASA GSFC
Earth at Night/Black Marble: Flat Maps
NASA Earth Observatory / NASA GSFC
Topography and Bathymetry Maps
Imagery by Jesse Allen, NASA's Earth Observatory, using data from the General Bathymetric Chart of the Oceans (GEBCO) produced by the British Oceanographic Data Centre.