- #1
Adam Laceky
- 5
- 2
Sorry, I'm not an astronomer. This question relates to the book "S." by Doug Dorst.
I understand that the celestial coordinates have a zero-point at the vernal equinox. (0h, 0m, 0s RA, 0⁰, 0", 0' Dec.)
I also understand that it's possible to map these coordinates to spherical, or geo-coordinates.
My question: Is there a standard mapping of celestial coordinates to the surface of the Earth? I bet that if there is, the vernal equinox would be pinned to 0⁰ N, 0⁰W. (The equator at GMT.)
For instance, Sagittarius, which is at 19h, 0m, 0s RZ, -25⁰, 0", 0', would map to 75⁰ W, 25⁰ S.
Is there such a correspondence, or did I just make that up?
I understand that the celestial coordinates have a zero-point at the vernal equinox. (0h, 0m, 0s RA, 0⁰, 0", 0' Dec.)
I also understand that it's possible to map these coordinates to spherical, or geo-coordinates.
My question: Is there a standard mapping of celestial coordinates to the surface of the Earth? I bet that if there is, the vernal equinox would be pinned to 0⁰ N, 0⁰W. (The equator at GMT.)
For instance, Sagittarius, which is at 19h, 0m, 0s RZ, -25⁰, 0", 0', would map to 75⁰ W, 25⁰ S.
Is there such a correspondence, or did I just make that up?