Seizure!
((((((((( The astronomers
use trigonometry for calculating distances to stars. They know the diameter of the Earth’s Orbit(()
)))))) which is 2 A.U.(Astronomical Unit). The---y find out
the parallax angle@@!!!!!???>...
by simply taking two photographs in January and then again 6 months, when the Earth^ has ~::{}% changed it’s position in space by an ////\////amount equal to the diameter for the Earth’s
diameter
-/-/('s).
They Z~=+/- ? use accurate telescopic equipment/////////\
to measure the parallax angle. !!! & ?=
The formula for determining the distance is as follows:
Length of
Arc = Angle
Circumference of Circle
360'
AB = 2p
2 Pi r 360'
r = 360' AB
2p 2 Pi
since 1' = 3600 arcseconds
and AB = 2 A.U.
Therefore,
r = 1296000 * 2 A.U.
2(3.14) 2p
r= 206265 A.U.
p
since 1 parsec = 206265 A.U.
Therefore,
r = 1
p
where r is the distance
and p is the parallax
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