Huawei P20 User Manual page 70

Use Star Track to Capture the Beauty of Stars
Star track lets you use your camera to capture the movement of stars in the night sky.
For best results, choose a location free of light pollution with an unobstructed view of the sky,
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and on a clear night.
Place your device on a tripod or solid surface so that it does not move during the exposure.
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1
Open , and go to Camera > More > Light painting > Star trails.
2
Hold your Phone steady, and then touch
3
A preview of the image is displayed in the viewfinder. Touch
to start shooting.
when you are finished.
Camera
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