 If you liked
Planetes
|
 ...then you might like
Musekinin Kanchou Tylor
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If you enjoyed the comical aspects to Planetes then you may enjoy Irresponsible Captain Tylor, which takes the comedy a good bit further. Though just like Planetes, the show does tend to have its serious and emotional scenes (especially towards the end, like Planetes). All in all, both are excellent space drama comedies.