See the Best Photos from an Astronaut’s Third Month in Space

Scott Kelly’s year in space has passed the 100 day mark. Scott began his historic year in space on March 27th. The mission’s goal is to test the boundaries of long-term space travel. While Scott spends the year in space his twin brother Kelly, also an astronaut, is back here on earth so scientists can gauge the differences in their bodies throughout the one year period.

You can check out a series of pictures taken by Scott and read more about his journey here.