Polaris Star (North Star)

One of the few men to have physically risen above the earth's atmosphere in a spacecraft (on an Apollo moon mission) said....

While on the dark side of the moon we made our observations into deep space, looking for black holes, pulsars, and other phenomena. It was total darkness, like being down in a deep mine. Because there was nothing to reflect the light, we could view a vast array of stars out the spacecraft window, far more than can be seen from earth. There was none of the twinkling caused by the earth’s atmosphere, so the stars were brilliant and unwavering—like a black cloth dotted with billions of stationary pinpoints of light.

Astronaut Jim Irwin, More Than Earthlings, 1983


GIF created from video: https://youtube.com/watch?v=ZakrH7FGotU Polaris Star (North Star) - Taken with a 10' Telescope - Stromback_photography

Apparently, it's not the stars themselves spontaneoulsy changing their brightness and colors, but it's the air between us on Earth and the stars above that distorts their light.