video was shared by NASA Thursday on its social media platforms.Some of the crew aboard the International Space Station celebrated 2021 by doing a zero-gravity ball drop in space. (Credit: NASA via Storyful) AdvertisementThere are currently seven astronauts on the ISS as part of Expedition 64, five of which appear in the festive video: Kate Rubins, Shannon Walker, Victor Glover, Michael Hopkins and Soichi Noguchi.RELATED: New Year's Eve: A look at celebrations around the world amid the coronavirus pandemicIn the final weeks of 2020, the astronauts have conducted dozens of scientific investigations.