There are 2 method of measure the distance in the world.
1. Direct method
2. Indirect method
1. :-direct method- there is aa direct measurement by a specific scale.it is a finite distance.it can be measure easily.
2. Indirect method- in this method the Pythagoras and parallax method is used to measure.
Stellar parallax method
(Parallax method)
Astronomers estimate the distance of star in space by using a method called stellar parallax, or trigonometric parallax. Simply put, they measure a star's apparent movement against the background of more distant stars as Earth revolves around the sun.
Parallax method
Definition:- 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.
:Astronomers estimate the distance of nearby objects in space by using a method called stellar parallax, or trigonometric parallax.
Click here for full pdf form of how to find the distance between star and earth
Q 》how can find de distance between earth and stars? Or click here
ans 》Parallex method is used to measure distance between the earth and star.
Distance from sun to earth=1AU(austronic unit)
1AU=1.5×(10)¹¹m
1AU=3×(10)¹¹m
Angle (L)=arc/radius
Let radius=d
d=arc/angle
