Blocking with melee will grant knockdown protection against obstacles, allowing for smoother flight. Alternatively, performing a slide/dash attack will allow passage through obstacles without slowing down.
A Centaur is a mythological creature that is half-human, half-horse.
Incidentally, there is a species of Rhinoceros beetle called the Centaurus beetle. The Centaur's blade resembles a Rhinoceros beetle's characteristic horn while the body of the weapon resembles the beetle's head.
The Centaur (along with the Fluctus and the Itzal) was accidentally leaked in Hotfix 15.6.1 (2014-12-11), where a bundle called the "Itzal Raider Pack" visually replaced the Stealth Pack in the Market. The Stealth Bundle still functioned as normal however.
Centaur being featured on the Archwings Reinforcement poster.
Centaur Codex entry bug, making your Waframe hold it by the outer shell.