Four Dimensions and Counting
Locating an object in 3-D space from a spinning and wobbling planet, which orbits a star, which orbits its galactic center that itself is receding from most other galaxies is … interesting.
I have to admit that when I first started astronomy I found the multiple references to time and coordinate systems extremely confusing. It took some time, helped by the research for this book, to fully appreciate and understand these terms. As the famous quote goes, “time is an illusion” and as it happens, so too are coordinate systems.
Consider the lonely astronomer, sitting on his planet observing billions of stars and galaxies floating around in space, all in constant motion with respect to each other and his own planet, ...
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