ASTR 5 Study Guide - Midterm Guide: Angular Diameter, The Moons, Angular Distance
Document Summary
Fall 1998, 1st midterm instructor: prof. amri wandel. Key at bottom: the moon"s angular diameter in our sky is measured to be half a degree. From this, we can find: the distance to the moon even if we have no other information about the moon b) The angular separation of this planet from the star as seen from the earth is expected to be a) 2 arc seconds: 0. 6 degree c) 2 arc minutes d) 1. 6 degrees, an astronomer discovers an object at a distance of 28 mpc from the earth. About 6 months d) just a few minutes: if a supernova was first seen in the year of christ"s birth (the star of. D) 6520 b. c: in 1998, an inhabitant of a planet orbiting a distant star observes the flash of the first nuclear explosion on earth, which occurred in july 1945.
