How to tell the direction by the sun?

The sun rises in the east and sets in the west, which is the most basic way to tell the direction.

You can also use the stick shadow method to measure. When the sun is enough to form a shadow, erect a straight stick (1 m or more) on the flat ground and put a stone (or other mark) on the shadow of the wooden stick. The shadow of the stick will move with the sun.

After 30 to 60 minutes, put another stone on the shadow of the stick. Then draw a straight line between the two stones, and draw a straight line perpendicular to it in the middle of this straight line. Then step on the first mark with your left foot and the second mark with your right foot. At this time, the front of the standing person is due north, the back is due south, the right hand is east, and the left hand is west.

Extended data

Use the stars to judge the direction

1, use Polaris

Polaris is located in the sky due north. When observed, its height from the ground is approximately equivalent to the local latitude. When looking for it, it is usually determined according to the Big Dipper (Ursa Major) or the W star (Hou Xian). The Big Dipper is seven bright stars, shaped like a spoon. It extends a straight line from the spoon head to the spoon mouth, which is about five times the distance between the two stars. There is a slightly darker star, the Polaris.

When the earth rotates and the Big Dipper can't be seen, you can use the W star to find it. W star is composed of five bright stars, shaped like a "W" letter, which extends to the W-shaped notch direction by about twice the width of the notch. This is Polaris.

Step 2 Use the Southern Cross

In the area south of 23 3' north latitude, you can sometimes see the Southern Cross at night, which can also be used to tell the direction. The Southern Cross consists of four brighter stars, which are shaped like a "ten". At the lower right of the Southern Cross, it extends down about four and a half times along the connecting line between the two stars (no stars are visible), that is, due south.

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