Miks õhtud on valgemad kui nädal tagasi?

Miks õhtud on valgemad kui nädal tagasi?

EN

Why Are Evenings Brighter Than a Week Ago?

Lugeja märkas, et kuigi , on õhtud valgemad kui nädal tagasi.
Õhtuti valgus tundub subjektiivne. See sõltub . Kui maas on lumi, tundub maailm veel valgem.
Päike liigub ikka oma rada. Objektiivsed andmed näitavad, et Tallinnas on 12.–19. detsembrini kell 15.20. Talvisel pööripäeval loojub päike juba minut hiljem. Hiliseim päikesetõus on 26.–28. detsembrini kell 9.19.
Tartu jaoks on 13.–18. detsembrini kell 15.21. Hiliseim päikesetõus on 27.–28. detsembrini kell 9.02.
Lühim päev Tallinnas on 19.–23. detsembrini (6 tundi ja 4 minutit). Tartus on 18.–24. detsembrini (6 tundi ja 23 minutit).
Miks ja varaseim loojang pole täpselt pööripäeval? See tuleneb Maaga seotud keerulisest geomeetriast. pole täpselt ringjoon. Sellepärast saabub enne pööripäeva.
Veel on tähele pandud, et Tartus on aasta pikem kui Tallinnas. Tartu on Tallinnast . Mida lõuna poole, seda pikemad on .
Tallinlastele lohutuseks: suvel on Tartu lühem kui Tallinnas.
A reader noticed that although the days are getting shorter, evenings are brighter than a week ago.
Evening light seems subjective. It depends on the weather and sunset. When there is snow on the ground, the world appears even brighter.
The Sun continues its path. Objective data shows that the earliest sunset in Tallinn occurs from December 12th to 19th at 15:20. On the winter solstice, the Sun sets a minute later. The latest sunrise is from December 26th to 28th at 9:19.
For Tartu, the earliest sunset occurs from December 13th to 18th at 15:21. The latest sunrise is from December 27th to 28th at 9:02.
The shortest day in Tallinn is from December 19th to 23rd (6 hours and 4 minutes). In Tartu, the shortest day is from December 18th to 24th (6 hours and 23 minutes).
Why is the latest sunrise and the earliest sunset not exactly on the solstice? This arises from the complex geometry related to the Earth. The Earth's orbit around the Sun is not perfectly circular. Therefore, the earliest sunset occurs before the solstice.
It has also been observed that the shortest day of the year in Tartu is longer than in Tallinn. Tartu is east and south of Tallinn. The further south you go, the longer the winter days become.
For Tallinners as a consolation: in summer, the longest day in Tartu is shorter than in Tallinn.