Images from Chūya Koyama's manga and the live-action version
To commemorate the live-action Space Brothers movie hitting Japanese theaters May 5th, Yūshu Service is offering a framed set of stamps featuring Mutta and Hibito:
The set of ten 50 yen postage stamps comes in a holder emblazoned with now familar live-action key visual and an introduction to the story and characters:
Note that you can't just waltz over to your local post office and pick these up—they must be ordered on the Stamaga.net shop page where the set runs 3150 yen (about US ~39.32). You also can't mail stuff to outer space or anything, but they are still pretty nifty!