International Space Station

It may be a long trip. Don't forget to pack the tampons. NASA hide caption

Russian cosmonaut Gennady Padalka gestures after landing near the town of Dzhezkazgan (Zhezkazgan), Kazakhstan, on Saturday. Reuters/Landov hide caption

The Soyuz-U space launch vehicle rocket carrying the Russian cargo ship Progress M-28M launched from the Baikonur Cosmodrome on Friday. The Progress resupply capsule successfully docked with the International Space Station on Sunday. Sergai Savostyanov/ITAR-TASS/Landov hide caption

A Russian Progress spacecraft blasts off from the launch pad at the Baikonur cosmodrome, Kazakhstan, on Friday. Reuters/Landov hide caption

The SpaceX Falcon 9 rocket and Dragon spacecraft breaks apart shortly after liftoff Sunday at the Cape Canaveral Air Force Station in Florida. John Raoux/AP hide caption

European Space Agency astronaut Samantha Cristoforetti of Italy checks her Sokol pressure suit aboard the International Space Station. Cristoforetti, who set an endurance record, is among three astronauts who returned on Thursday. ESA/LANDOV hide caption

A Proton-M rocket shown in 2013. The same type of rocket malfunctioned in mid-flight on Saturday and crashed over Siberia carrying a Mexican communications satellite. PHOTO ITAR-TASS/ITAR-TASS/Landov hide caption

In this photo posted on Twitter on Sunday, and provided by NASA, Italian astronaut Samantha Cristoforetti sips espresso from a cup designed for use in zero gravity, on the International Space Station. AP hide caption

A Russian launch vehicle carrying the Progress M-27M cargo ship lifts off from the Baikonur cosmodrome in Kazakhstan on Tuesday. Fears mounted Wednesday that the unmanned cargo capsule was lost and may plunge back to Earth as ground control failed to gain control of the orbiting ship for a second day in a row. Roscosmos/EPA /Landov hide caption

The SpaceX Dragon cargo capsule nears the International Space Station on Friday, as astronauts prepare to snag it with a robotic arm. NASA TV hide caption

Astronaut Terry Virts points to his helmet as he sits inside the International Space Station on Wednesday. AP hide caption

Expedition 45 poses for a Star Wars themed portrait NASA hide caption

An image provided by SpaceX showing the barge that was used in an unsuccessful attempt to recover the Falcon 9 first stage. AP hide caption