What is sunrise: Definition and 3 Discussions

Sunrise (or sunup) is the moment when the upper rim of the Sun appears on the horizon in the morning. The term can also refer to the entire process of the solar disk crossing the horizon and its accompanying atmospheric effects.

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  1. C

    Double Sunrise Phenomenon Explanation?

    How did you find PF?: Googling about a double sunrise phenomenon, since I have just photographed and videoed one. I just want to share some photos, and a video, I personally took sitting in the observation deck of a cruise ship between Cabo, San, Lucas, and Ensenada, Mexico, while out at sea...
  2. DaveC426913

    Direction (bearing) of sunrise/sunset

    One piece of Earth/astro geometry that always confused me is why the sun is able to set north of West. (I suppose it must also rise north of East, but I'll have to take the word of Early Birds on that.) I try to build a mental model of the Earth's tilt over the seasons and visualize where the...
  3. G

    I Longest day of the year is June 21 but longest daylight is June 26?

    I was reading a NASA web side where I can find angle of the sun and day length at my zip code. Longest day of the year is June 21 for 2 years then June 22 for 2 years, after leap year, longest day is June 21 again for 2 years. I already knew that. Then I see something I never saw before. If...
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