Many amateur astronomers have difficulty understanding the equatorial coordinate system at first. But once you get the hang of it, using it becomes as easy as using latitude and longitude to ...

The satellite positions derived from these BM were wrong by up to ± 200 kilometers in each of the three coordinates x, y, and z of the Earth-fixed, geocentric, equatorial coordinate system. The ...

More commonly, however, this column will use a horizontal coordinate system to define an object's place in the sky. In this system, altitude is simply an object's angular distance above the ...

Today, I want to talk about the equatorial coordinate system. Start with this: What if we could project Earth’s coordinates of longitude and latitude into the sky? Latitude wouldn’t be a ...

Coordinate systems can specify a position in 3-dimensional space, or merely the direction of the object on the celestial sphere, if its distance is not known or not important.