What is a meridian? A meridian is a north-south line, selected as the zero reference line for astronomical observations. By comparing thousands of observations taken from the same meridian it’s possible to build up an accurate map of the sky.
What is a meridian? A meridian is a north-south line, selected as the zero reference line for astronomical observations. By comparing thousands of observations taken from the same meridian it’s possible to build up an accurate map of the sky.