1. What is the inverse-square law? Use it to explain why a headlight on a car can appear brighter than a star, even though the headlight emits far less light energy per second. 2. Van Maanen’s star,...

1. What is the inverse-square law? Use it to explain why a headlight on a car can appear brighter than a star, even though the headlight emits far less light energy per second.

2. Van Maanen’s star, named after the Dutch astronomer who discovered it, has a parallax angle of 0.232 arcsec. How far away is the star?