Time-lapse photography, the stars slowly cross into a line, how to do it?

You can get this effect with a digital camera.

Star movement: take photos every once in a while, and finally synthesize a series of photos into video or animation forms such as gif, png and avi.

Star Trailing: The method is the same as above, but each exposure time is lengthened to get the effect of star trailing, and finally the video or animation is synthesized.