Kaynaklar:

  • 2020 Gök Olayları Yıllığı, TÜBİTAK Ulusal Gözlemevi
  • https://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html
  • https://mars.nasa.gov/all-about-mars/night-sky/opposition/
  • https://nssdc.gsfc.nasa.gov/planetary/factsheet/marsfact.html
  • https://www.esa.int/ESA_Multimedia/Images/2011/03/Comet_Halley_s_nucleus_as_seen_by_Giotto
  • https://www.imo.net/resources/calendar/
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