ESS11
Prof.
Jin-Yi Yu
Seasons and the Elliptical Orbit
qSeasons
Solstices: mark the
longest and shortest
days of the years (June 21 and December 21 in the northern hemisphere, the reverse in the southern)
Equinoxes: the length of
night and day
become equal in each hemisphere.
qAt the present-day orbit, the winter and summer solstices differ from the aphelion and perihelion by about 13 days.
