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I Converting galactical coordinates to horizontal/geographical coordinates

  1. Nov 27, 2016 #1
    Hello,

    I am doing an astrophysics project about Orion belt constelation and the pyramids of Giza. I am interested in the myth that the three pyramids is an exact copy of Orion belt. How should I convert galactical latitude/longtitude to linear/geographical coordinates so I could compare the constellation graph to pictures of the pyramids. I just used galactical longtitude/latitude to draw a graph in Origin and then I put it on to picture, my teacher said that it could have big errors there.
     
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  3. Nov 27, 2016 #2

    Bandersnatch

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    Do you mean equatorial coordinates (right ascension and declination) to geographic (latitude and longitude)?
     
  4. Nov 27, 2016 #3
    In stellarium there are equatorial coordinates and galactical coordinates. I was using galactical coordinates. How should I convert equatorial coordinates to geographic?
     
  5. Nov 27, 2016 #4

    Bandersnatch

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    In equatorial coordinates, declination corresponds* to latitude in geographic. Right ascension in terms of relative position corresponds to longitude expressed in hours, i.e. 360° is 24 hours (so 1 h is 360°/24=15°, and so on). The difference between RA and longitude is in where the 0th line is drawn (Greenwich on Earth vs vernal equinox on the celestial sphere), but as long as you're only interested in graphing relative positions of the stars and the pyramids, that should not interest you.

    *in terms of a projection of one spherical surface onto the other
     
  6. Nov 27, 2016 #5
    Thank you very much
     
  7. Dec 3, 2016 #6
    It seems that I was doing it wrong. How could I change the position of Orions belt projection on Earth to the place of pyramids and then tighten it to match Giza pyramids?
     
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