Winter solstice one must be able to observe a change in azimuth or elevation less than or equal to about 1/60 of the angular diameter of the sun. Observing that it occurred within a two-day period is easier, requiring an observation precision of only about 1/16 of the angular diameter of the sun. Thus, many observations are of the day of the solstice rather than the instant. This is often done by observing the sunrise and sunset or using an astronomically aligned instrument that allows a ray of light to be cast on a certain point around that time. Length of day
Four Months Ago... Four Months Ago... "Four Months Ago..." is the eighth episode of the second season of the NBC science fiction drama series "Heroes". The episode was written by series creator/executive producer Tim Kring and was directed by executive producer Greg Beeman. It originally aired on November 12, 2007. The episode explains what happened during the four months between the first two seasons. Peter runs into Adam Monroe at the warehouse in Montreal. Adam helps Peter recover his memory using his healing powers by thinking of his brother, Nathan. Peter flashes back to four months earlier when Nathan is flying a radioactive