NASA astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore have reached their six-month milestone of being stranded on the International Space Station, despite initially planning to stay for just eight days.

Two stranded NASA astronauts have followers scratching their heads over a festive new photo that shows the space travelers getting into the holiday spirit.

NASA is getting into the festive spirit, sharing some stunning images of the Christmas Tree Cluster and the Cosmic Wreath. The star clusters are a marvel of deep space, showcasing the beauty to be found beyond our planet, and what's more, they're only a mere 200,000 light-years away.