| This means that only one set of coordinates is required for each object, and that these same coordinates can be used by observers in different locations and at different times | The is basically the projection of the latitude and longitude coordinate system we use here on Earth, onto the celestial sphere |
|---|---|
| Lines of longitude have their equivalent in lines of , but whereas longitude is measured in degrees, minutes and seconds east the Greenwich , RA is measured in hours, minutes and seconds east from where the celestial equator intersects the the | At first glance, this system of uniquely positioning an object through two coordinates appears easy to implement and maintain |
This is the preferred coordinate system to pinpoint objects on the.
1.
3.
24