来自MSN1 个月
A rare overcast sunset painted Canada's sky pink
At sunset, however, sunlight travels a much longer distance through the atmosphere. Most of the blue light is scattered out of view, leaving behind the longer red and pink wavelengths. Red and ...
KREM5 年
Why the earliest sunset and the winter solstice aren't on the same day
But wait - isn't the shortest day of the year the winter solstice on Dec. 21? It is! So why doesn't our earliest sunset fall on the same day as the shortest day?The answer lies in Earth's orbit ...