crater moon faustini temperatures pole reached upper seen south where cbc nasa shadowy measured coldest spot yet orbiter reconnaissance lunar
atmosphere s4 roughly reside limb subsolar indicate latitudes
sun earth geometry solstice noon altitude solar degrees equinox north during june december figure horizon 6h
sun earth geometry solstice equinox june december during solar angles noon pole equator 6h latitude altitude 23 south relationship geography
sun seasons declination earth solar latitude angle day hemisphere year time northern point subsolar throughout geometry intensity hours equator seasonal