They did the Monster Mash… in SPACE! 👻🎃💫 ⁣ ⁣ Russian cosmonaut Sergei Prokopev, European Space Agency astronaut Alex Gerst and NASA astronaut Serena Auñón-Chancellor posed for a Halloween photo on the iss in 2018.⁣ ⁣ If you have a stellar space-themed Halloween costume, share your photos with us using #NASAcostume ⁣ #NASA #space #halloween #spooky