Yes, on Earth. The moon follows the same path in the sky as the sun. At the North or South pole, you only have one sunrise and one sunset - at the spring equinox at the north pole, the sun rises and circles around the horizon. So does the moon. As the summer progresses the sun and moon spiral up in the sky, to a maximum elevation, then after mid summer's day, they spiral down again, then both set at the autumn equinox.
Anywhere north of the Arctic circle, then both sun and moon are above the horizon continuously for part of the summer.
Same in the southern hemisphere for seasons reversed.
In the case of Pluto, then Charon is tidally locked to Pluto and vice versa. So if you are anywhere on Pluto then Charon is in a fixed position in the sky and vica versa. So from Pluto, Charon never rises or sets. It is either above the horizon or below and stays there, depending where you are. It will appear to rise and set only if you move around on the surface of Pluto.
Anywhere north of the Arctic circle, then both sun and moon are above the horizon continuously for part of the summer.
Same in the southern hemisphere for seasons reversed.
In the case of Pluto, then Charon is tidally locked to Pluto and vice versa. So if you are anywhere on Pluto then Charon is in a fixed position in the sky and vica versa. So from Pluto, Charon never rises or sets. It is either above the horizon or below and stays there, depending where you are. It will appear to rise and set only if you move around on the surface of Pluto.
About the Author
Robert Walker
Writer of articles on Mars and Space issues - Software Developer of Tune Smithy, Bounce Metronome etc.Studied at Wolfson College, Oxford
Lives in Isle of Mull
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