This image was captured when the sun was around 15 degrees below horizon and the sky was reaching its astronomical darkness condition. That's why we were able to see the milkyway galaxy and the Zodiacal light also created a false dusk impression. During normal day, you will not be able to see the sunset colors at this time because the sky would have been completely dark! Zodiacal light appears as a faint light in this image coming from Mount Batok pointing towards the Milky Way Galaxy but it's actually pointing towards the pathway traveled by the Sun and Moon as they journey across our sky.
Zodiacal light is actually sunlight reflecting off dust grains that circle the sun in the inner solar system. These grains are thought to be left over from the process that created our Earth and the other planets of our solar system 4.5 billion years ago.
I also did a 6 hours timelapse for this amazing phenomenon.