It’s Space Month here on Blastr, so it’s a perfect time to throw some appreciation at the greatest spacefaring law enforcement officials in the universe: the Green Lantern Corps! Powered by the emerald energy of willpower, the Green Lantern Corps has been defending the spaceways of the DC Universe since the concept was introduced in 1959 by John Broome and Gil Kane in Showcase #22, and their ranks have swelled since then.

While you’re no doubt familiar with many of the members that have been recruited from Earth, there are countless Lanterns hailing from planets across the cosmos that have put their lives on the line for the Corps. So today we’ll be looking past the humans (John, Kyle, Alan, Guy, Jessica, Hal and Simon, from best to worst, if you must know) who’ve worn the power ring to shine the viridian spotlight on 15 of the weirdest, wildest and most wonderful aliens ever to recite the oath.

Did your favorite Green Lantern escape our sight? Let us know your preferred ring-slingers in the comments below.