4. How far, in parsecs, is an object that has a parallax p of 0.00023 arc-seconds? How far is it, in light-years? Part 2: Measuring Parallax The circle labeled E in the diagram at left represents the Earth in its orbit in January. Use a ruler and draw a line from the Earth to the background stars going through star A. Mark the Earth-Star A-Sun angle. This is called the parallax angle. 5. Describe what you think will happen to that angle if we were to do what we did in step #1 again but for star B, which is farther away