Little Astronauts Around Melbourne

In my wanderings around Melbourne city I have spotted quite a few of these little guys, paste-ups, all doing slightly different things, all in random places.

These ones, specifically, were spotted in little back laneways off Little Bourke Street.

They are so cute! And placed for the keen observer - they are understated, and close to the ground - blink and rush past, and you have missed him.

I am not sure who the artist is, there is no sign off or indication, and a search to find any reference online has found nothing. Has caught my eye, though!