Answer: Your welcome!
Step-by-step explanation:
Using Afterglow, you would stack the two images of Alpha Centauri taken by the same telescope six months apart by aligning them using the reference points provided. Afterglow will then measure the angular shift between the two images, which is the parallax of Alpha Centauri. The angular shift measured by Afterglow is the parallax angle, which is the angle of displacement of Alpha Centauri due to its motion around the Sun. This angle can be used to calculate the distance of Alpha Centauri from the Earth.