宇 (Kanji for cosmos)

Onyomi

U	The big bang that started the cosmos was really UUUUURUSAI!

If you go out in the cosmos, make sure to wear a crown (helmet) otherwise you will dry out (as your blood boils and sprays out of your skull).

宇宙人(うちゅうじん)	alien ★★★☆☆ 宇宙 (outer space) + 人 (person) = 宇宙人 (alien)
宇宙(うちゅう)	outer space ★★★☆☆ 宇 (cosmos) + 宙 (space) = 宇宙 (outer space)
宇宙船(うちゅうせん)	space ship ★☆☆☆☆ NEO 宇宙 (outer space) + 船 (ship) = 宇宙船 (space ship)

The CHILD can only write one letter.

There's a THOUSAND cosmoses in string theory.
The MOHICAN punker has a knowledge of @narchy.