Create an image of a giant robot adorned with intricate street art graffiti, towering over a city skyline under a star-filled night sky, with constellations representing different planets and galaxies in the background.

A massive, awe-inspiring robot stands tall, completely adorned with intricate graffiti art reminiscent of street culture; its detailed patterns and striking colors grab the attention. This mechanical behemoth effortlessly towers over a sprawling urban cityline. Beneath it, shiny skyscrapers and congested streets hum with the buzzing nightlife. Above, the night sky unfolds in a glorious display of stars - not ordinary stars, but unusual constellations that take on the forms of various distant planets and galaxies, creating an extraordinary celestial backdrop to this surreal cityscape.