Question

How can we find the distance of moon by Parallax method?

Answer 1

Hold the arm with the finger stretched. ...Measure the distance between your eyes with a ruler.Measure b with your angle-measuring tool.Make a drawing on scale and find from that the distance between your eyes and your finger.

Answer 2

There are two ways to measure the distance from the Earth to the Moon on your own: using a Lunar eclipse and using parallax let us look on parallax.


the method of parallax has been used first in astronomy to determine the distance to the Moon. A successful measurement was carried out already in the second century B.C. by Hipparchus. He used observations of the solar eclipse of March 14, 189 B.C. Witnesses living near the Hellespont, the narrow strait of North-western Turkey, reported that the eclipse was total. However observers at Alexandria saw only four-fifths of the sun obscured by the lunar disk. Hipparchus assumed that the Sun is sufficiently distant so that during the several minutes of maximum eclipse, she served as a stationary marker against which the Moon's parallax could be gauged. So about 1/5 of the Sun's diameter had been shifted because parallax from the two terrestrial vantage points. We see the Sun under an angle of about 0.5 degree, therefore one-tenth of a degree is the Moon's parallax over a baseline extending between the Hellespont and Alexandria. Combining, Hipparchus deduced from this the Moon's distance: between thirty-five and forty one Earth-diameters. The true value is approximately thirty Earth-diameters. Respectably close, considered that the work was carried out more than 2.000 years ago.