1.   As the sun angle increases, the snowpack melts rapidly on the sides of hills exposed to solar radiation.

2.   The contribution of solar energy to the daily cycle of temperature is limited when sun angles are low.

3.   Thunderstorms diminish in late summer as the lower atmosphere cools in response to lengthening darkness and lower sun angles.

4.   He illuminates the models with a single high-intensity light adjusted to mimic the sun angle present at the time of the depiction.

5.   The accident knocked the station away from the ideal sun angle for the remaining solar panels to keep charging, Culbertson said.