What are some fictional names for planets and alien races?

Random planet name generator
http://www.amaranthtraces.com/namegenerator.php

Random alien name generator
http://www.seventhsanctum.com/generate.php?Genname=alienracename

Try spelling common words backwards and see what you come up with.

sdrow nommoc: Cool idea, @Judi!

@judi’s suggestion of spelling words backwards is especially god if you want to give reader a little bit of extra information about the planet or alien. Writers have even taken a word they want and mixed up the letters. The extra meaning surfaces long after publishing, making the book a search for hidden meanings. It’s great if you want a brain-bender!

How about a planetary name that’s based on a first-person anatomical perspective: Myanus? ;-)

Zodiac signs might work

I like @Judi‘s idea. You could also just rearrange letters. A planet that is very green you could call Travend (verdant). A very blue planet Quoirtuse (turquoise).

Another idea use letters like x and z in the names.