Photons hitting the camera sensor; from the white shining Planet Jupiter, who stands near the main stars in Gemini; There is the nearby orange giant star "Castor" about 34 light years away from earth. A a bit further away the hot, bluish star named "Pollux" - actually made out of a sextuple star system - organized into three binary pairs, around 49 light years away. 

Move the camera.

Paint.

Whatever you like.

With the light photons from distant places...

The reddish patterns to the right, come from underexposed leafs illuminated from a tungsten light in the distance.

Two things I find interesting:

I find two things interesting. One is that the colors of the stars came out more clearly with this primitive light painting. Second is, that when you look at the colors at pixel level, you see that the light / color changes. I assume this is what we often see as sparkling stars. The subtle change you get from stars seemingly shifting light and even colors. That is clearly visible in the original photo.

Distinguish planet from stars

The light from planets is often still, while stars sparkle/flicker. (this rule applies to brighter objects, and when they are a bit above the horizon). If a planet i close to the horizon, it too seems to sparkle - because the denser layers of the atmosphere, makes the light from a bright planet like Jupiter and Venus, appear to flicker/sparkle. This usually disappears once they stand higher above the horizon. After all - they only reflect the light of the sun.

The stars on the other hand, emit their own light. They are suns like ours - but sometimes with vastly different sizes, colors and temperature.