1. A

    Geometry question about the radius of star trails

    I have a project going related to Flat Earth debunking, but I want to get some geometry right first. It is commonly observed that star trails near the poles are circles, while a star trail right on the celestial equator is a straight line, since it is a great circle on the celestial sphere. I...
  2. Astro

    Identifying Sun and Moon Transits

    I wrote a python program for identifying potential sun or moon transits involving a certain observer location but an uncertain observing time and/or date. It searches a TLE file containing satellite orbits for transits of the sun or moon over a user-specified number of days at a given location...
  3. Whitebeard

    Debunked: Nibiru FOUND? Mysterious gigantic rogue planet spotted lurking outside our solar system

    Nibiru FOUND? Mysterious gigantic rogue planet spotted lurking outside our solar system Thus claims UK tabloid and conspracy fan gutter rag The Daily Star, the article continues... A MYSTERIOUS large object has been spotted floating around outside our solar system – and people are convinced...
  4. C

    Interesting observation of moon light phenomena i can't find the answer to ????

    It was around 3:00 am at night ,,It was cool breeze so I went to rooftop with my binoculars and Android phone just to lay down and enjoy the breeze , I watched the moon it was brighter than usual there were clouds moving dark and light both I recorded the moon then paused recording when clouds...
  5. Astro

    Debunked: Earth is moving too slowly as seen from STEREO Ahead

    STEREO is a NASA mission consisting of two satellites, one ahead of the Earth's orbit, and one behind. They both have a variety of instruments, including five cameras, two of which are specifically for photographing the Sun's corona, COR1 and COR2 Earth has been visible on STEREO Ahead in the...