The off-axis guider allows you to guide your telescope through the same optics that are taking the picture. This eliminates any possibility of guiding error if you carefully keep the guide star centered under the eyepiece crosshairs. But careful attention must be paid to your guiding.
Time difference between Boston and Shanghai is 12 Hours. Current local time in Boston is 2017-04-13, 22:31 EDT and time in Shanghai is 2017-04-14, 10:31 CST. Please fill out the fields below to calculate distance. Search by IATA airport code, city or airport name.
The major city closest to the halfway point between Harrisburg, PA and New Boston, NH is Brooklyn, NY, situated 174.91 miles from Harrisburg, PA and 232.01 miles from New Boston, NH. It would take 3 hours 36 mins to go from Harrisburg to and 5 hours 4 mins to go from New Boston to Brooklyn.