Photos: Space Station's Expedition 37/38 Mission in Pictures

Mike Hopkins on ISS: Sunflower Breaks Free of Shell

This great image of a sunflower was taken from the International Space Station by NASA astronaut Mike Hopkins on Nov. 13, 2013. “It took a little help, but the sunflower finally broke free from its shell! Freedom at last,” Hopkins tweeted.

Mike Hopkins on ISS: Sprout Tries to Break Out of Shell

This great image of a pumpkin sprout was taken from the International Space Station by NASA astronaut Mike Hopkins on Nov. 7, 2013. “The sunflower sprout has a companion. It is a pumpkin sprout trying to break out of its shell,” Hopkins tweeted.

Mike Hopkins with SPHERES Mini Satellites on ISS

This photo of NASA astronaut Mike Hopkins with SPHERES mini satellites was taken aboard the International Space Station on Nov. 6, 2013. “The SPHERES mini satellites are used to test various station keeping and control theories. Great day of testing!” Hopkins tweeted.

Mike Hopkins: Niger Hills Like Boot Print on the Moon

This fascinating image of hills in Niger was taken from the International Space Station by NASA astronaut Mike Hopkins on Nov. 5, 2013. “These are hills in Niger, but I think they look an awful lot like a boot print on the moon,” he tweeted.

Mike Hopkins: New Life on ISS

This spectacular photo of a two-day old sunflower sprout was taken from the International Space Station by NASA astronaut Mike Hopkins on Oct. 22, 2013. “New life on ISS. A sunflower sprout is now 2 days old. Another few days at this growth rate & it will need a new home,” he tweeted.

Mike Hopkins and Luca Parmitano Change Valve on ISS

This photo of NASA astronaut Mike Hopkins and Luca Parmitano changing a valve was taken aboard the International Space Station on Oct. 30, 2013. “My crewmates & I changed out a valve on the CO2 removal system. Sometimes we're like plumbers or electricians up here,” Hopkins tweeted.

Mike Hopkins on ISS: Freezing Samples for Research

This image of NASA astronaut Mike Hopkins freezing samples for human research was taken aboard the International Space Station on Oct. 22, 2013. “We collect a lot of saliva, blood & urine for human research on ISS, but until it comes home, it has to stay frozen,” he tweeted.

Mike Hopkins Snaps Amazing Image of Moonlit Alps

This spectacular view of the Alps was taken from the International Space Station by NASA astronaut Mike Hopkins on Oct. 19, 2013. “Past few nights over Europe & Middle East have been amazing with the moonlight. Check out the alps from 260 mls up,” Hopkins tweeted.

Mike Hopkins Tweets Selfie from ISS Cupola

This cool photo of NASA astronaut Mike Hopkins was taken from the cupola of the International Space Station on Oct. 15, 2013. “Can't believe this is really me from the Cupola and that I've been in space for almost 3 weeks now!” Hopkins tweeted.

Mike Hopkins Aboard ISS: Dubai

This amazing view of Dubai, United Arab Emirates was taken from the International Space Station by NASA astronaut Mike Hopkins on Oct. 14, 2013. “Not something you see every day first hand. With features like this, Dubai stands out from 260 miles up.” He tweeted.