"Planet X" has it all: mystery, science and it's the Roman numeral for 10, and planets all have Roman names anyway.
Of course, according to ALF, the universe already named it Dave. Or it might've been Alvin.
TS
Only because we don't use the Greek names in English. Then they'd be; Hermes, Aphrodite, Ares, Zeus, Cronos, Ouranos, Poseidon and Hades.
I misread your last sentence.
I thought you wrote that "the universe is named Dave."
Strange name for the universe.