Congratulations, Peggy Whitson!#Repost @explorenasa ・・・ NASA astronaut Peggy Whitson floating through the Unity module aboard the International Space Station (@ISS) during the Expedition 50 mission in this photo taken on November 28, 2016. Whitson officially sets the U.S. record today for most cumulative days in space, surpassing @NASA astronaut Jeff Williams’ record of 534 days. Additionally, she is the first woman to command the space station twice, and holds the record for most spacewalks conducted by a female astronaut. Credit: @NASA #science #space #NASA #womeninscience #astronaut #internationalspacestation #PeggyWhitson #NASAWomen #women #earth #spacewalk #USA