Dayton city in the state of Ohio is where Sinclair is located. Its latitude is 39.7589 degree North. This means to an observer in Dayton city, Polaris, the North Star, is about the same degree above its northers horizon. Find Polaris on the sky chart, then use the Year, Month, Day, Hour, Minute buttons across the top of the sky chart to adjust view for various years, months, date and time. Keep your eye on Polaris as you change the time of observation, does its position in the sky change over time? Important note: When you click the "+" and "-" buttons to change the day, hour, and/or minute, the chart automatically updates itself. However, each time after changing the year or month, you must click Update button in order for the chart to update to the new observation year or month.
a. The position of Polaris does not change with time.
b. Over time, Polaris moves in a curved line across the sky.
c. Over time, Polaris moves in a circle.
d. Over time, Polaris moves in a straight line across the sky.