Physics Class 11 Chapter 2. Units and Measurements | Page 4

Distance of pluto from sun 10 13
Size of our galaxy 10 21
Distance to Andromeda Galaxy 10 22
Distance to observable universe boundaries 10 26
Measuring large Distances – Parallax Method o
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight , and is measured by the angle or semi-angle of inclination between those two lines . Distance between the two viewpoints is called Basis .