International Space Station

The Soyuz MS-02 spacecraft carrying the crew of Shane Kimbrough of the U.S., Sergey Ryzhikov and Andrey Borisenko of Russia blasts off to the International Space Station (ISS) from the launchpad at the Baikonur cosmodrome, Kazakhstan, October 19, 2016.  REUTERS/Shamil Zhumatov

Shamil Zhumatov/Reuters

The Soyuz MS-02 spacecraft carrying the crew of Shane Kimbrough of the U.S., Sergey Ryzhikov and Andrey Borisenko of Russia blasts off to the International Space Station (ISS) from the launchpad at the Baikonur cosmodrome, Kazakhstan. Photo Shamil Zhumatov/Reuters 

In this photo taken with a fisheye lens and with long time exposure, the Soyuz-FG rocket booster with Soyuz MS space ship carrying a new crew to the International Space Station, ISS, blasts off at the Russian leased Baikonur cosmodrome, Kazakhstan, Thursday, July 7, 2016. (AP Photo/Dmitri Lovetsky)

Dmitri Lovetsky/AP

In this photo taken with a fisheye lens and a long exposure, the Soyuz-FG rocket booster with Soyuz MS space ship blasts off at the Russian leased Baikonur cosmodrome in Kazakhstan. The ship carries a new crew to the International Space Station

British astronaut Tim Peake in action running the London marathon while strapped to a treadmill at the International Space Station on Sunday April 24, 2016. While the official 2016 London Marathon was being run in London, Peake ran 26.2 miles on a treadmill in three hours 35 minutes 21 seconds, while aboard the apace station in orbit 250km above the Earth.(EUROPEAN SPACE AGENCY (ESA) via AP) TV OUT

ESA/AP

British astronaut Tim Peake in action running the London marathon while strapped to a treadmill at the International Space Station. While the official 2016 London Marathon was being run in London, Peake ran 26.2 miles on a treadmill in three hours 35 minutes 21 seconds, while aboard the apace station in orbit 250km above the Earth 

Expedition 46 On International Space Station...IN SPACE - APRIl 17: (EDITORIAL USE ONLY) (NO SALES) This handout image supplied by the European Space Agency (ESA), shows the Aurora Australis, southern lights, in an image taken by ESA astronaut Tim Peake from the International Space Station on April 17, 2016. ESA astronaut Tim Peake is performing more than 30 scientific experiments and taking part in numerous others from ESA's international partners during his six-month mission, named Principia, after Isaac Newtons ground-breaking Naturalis Principia Mathematica, which describes the principal laws of motion and gravity.  (Photo by Tim Peake / ESA/NASA via Getty Images)

Tim Peake/ESA/NASA/Getty

This handout image supplied by the European Space Agency (ESA), shows the Aurora Australis, southern lights, in an image taken by ESA astronaut Tim Peake from the International Space Station

An Orbital ATK's Cygnus space craft atop a United Launch Alliance Atlas V rocket launchs from Cape Canaveral Air Force Station to go to the International Space Station as seen from Viera in Brevard County, Fla., Tuesday, March 22, 2016. (Tim Shortt/Florida Today via AP)  NO SALES; MANDATORY CREDIT

Tim Shortt/Florida Today/AP

An Orbital ATK’s Cygnus space craft atop a United Launch Alliance Atlas V rocket launches from Cape Canaveral Air Force Station to go to the International Space Station as seen from Viera in Brevard County, Florida 

Russian Soyuz TMA-20M rocket booster is moved for installation ahead of launch...epa05213713 Russian Soyuz TMA-20M rocket booster is moved for installation at the launch pad at Baikonur cosmodrome in Kazakhstan, 16 March 2016. The crew is set to take off from Kazakhstan's Baikonur cosmodrome to the International Space Station (ISS) on 19 March 2016.  EPA/YURI KOCHETKOV

Yuru Kochetkov/EPA

Russian Soyuz TMA-20M rocket booster is moved for installation at the launch pad at Baikonur cosmodrome in Kazakhstan. The crew is set to take off from Kazakhstan’s Baikonur cosmodrome to the International Space Station on Saturday

Soyuz TMA-18M space capsule carrying the International Space Station (ISS) crew members prepares to land in a remote area outside the town of Dzhezkazgan, Kazakhstan

Krill Kudryavtsev/AP

Soyuz TMA-18M space capsule carrying the International Space Station (ISS) crew members prepares to land in a remote area outside the town of Dzhezkazgan, Kazakhstan

Expedition 46 On International Space Station...IN SPACE - JANUARY 20: (EDITORIAL USE ONLY) (NO SALES) In this handout image supplied by the European Space Agency (ESA), A photo of an aurora taken by ESA astronaut Tim Peake from on board the International Space Station, January 20, 2016. Expedition 46-47 crewmembers ESA astronaut Tim Peake, NASA astronaut Tim Kopra and Russian cosmonaut commander Yuri Malenchenko were welcomed aboard the International Space Station by Russian cosmonauts Mikhail Korniyenko and Oleg Kononenko, and NASA astronaut Scott Kelly for a six-month mission, as part of Expedition 46. (Photo by Tim Peake / ESA via Getty Images)

Tim Peake/ESA/Getty

An aurora photographed by ESA astronaut Tim Peake from on board the International Space Station

Flight Engineer Tim Kopra

  © NASA

The Soyuz-FG rocket booster with Soyuz TMA-19M space ship carrying a new crew to the International Space Station, ISS, blasts off at the Russian leased Baikonur cosmodrome, Kazakhstan, Tuesday, Dec. 15, 2015. The Russian rocket carries British astronaut Tim Peake, Russian cosmonaut Yuri Malenchenko and U.S. astronaut Tim Kopra. (AP Photo/Dmitry Lovetsky)

Dmitry Lovetsky/AP

The Soyuz-FG rocket booster with Soyuz TMA-19M space ship carrying a new crew to the International Space Station, ISS, blasts off at the Russian leased Baikonur in Kazakhstan. The Russian rocket carries British astronaut Tim Peake, Russian cosmonaut Yuri Malenchenko and U.S. astronaut Tim Kopra 

British astronaut Tim Peake, member of the main crew of the expedition to the International Space Station (ISS), waves to his children from a bus prior the launch of Soyuz TMA-19M space ship at the Russian leased Baikonur cosmodrome, Kazakhstan...British astronaut Tim Peake, member of the main crew of the expedition to the International Space Station (ISS), waves to his children from a bus prior the launch of Soyuz TMA-19M space ship at the Russian leased Baikonur cosmodrome, Kazakhstan, Tuesday, Dec. 15, 2015.  REUTERS/Dmitry Lovetsky/PoolDmitry Lovetsky/Reuters

British astronaut Tim Peake, member of the main crew of the expedition to the International Space Station (ISS), waves to his children from a bus prior the launch of Soyuz TMA-19M space ship at the Russian leased Baikonur cosmodrome, Kazakhstan

The Soyuz blast off from Baikonur cosmodrome

Yuri Kochetkov/EPA

The Soyuz TMA-17M rocket blasts off from the Baikonur cosmodrome in Kazakhstan, on Thursday, carrying members of the expedition 44/45 NASA astronaut Kjell Lindgren, Japanese astronaut Kimiya Yui and Russian cosmonaut Oleg Kononenko to the International Space Station (ISS).

The remnant of Cyclone Joalane is seen in the moonlit Southern Indian Ocean in this picture taken by astronaut Terry Virts from NASA's International Space Station...The remnant of Cyclone Joalane appears in the moonlit Southern Indian Ocean, with the Milky Way rising behind it, as seen in this picture taken by astronaut Terry Virts from NASA's International Space Station April 13, 2015.   REUTERS/NASA/Terry Virts/Handout  THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS

Terry Virts/NASA/Reuters

The remnant of Cyclone Joalane appears in the moonlit Southern Indian Ocean, with the Milky Way rising behind it, as seen in this picture taken by astronaut Terry Virts from Nasa’s space station 

A Russian Orthodox priest blesses the So...A Russian Orthodox priest blesses the Soyuz TMA-16M spacecraft at the launch pad of the Russian-leased Baikonur cosmodrome on March 26, 2015. Russia's Soyuz TMA-16M spacecraft carrying the International Space Station (ISS) crew of US astronaut Scott Kelly and Russian cosmonauts Gennady Padalka and Mikhail Kornienko is scheduled to blast off to the ISS from Baikonur early on March 28, Kazakh time. AFP PHOTO / KIRILL KUDRYAVTSEVKIRILL KUDRYAVTSEV/AFP/Getty Images

Kirill Kudryavtsev/AFP/Getty

A Russian Orthodox priest blesses the Soyuz TMA-16M spacecraft at the launch pad of the Russian-leased Baikonur cosmodrome. Russia‘s Soyuz TMA-16M spacecraft carrying the International Space Station (ISS) crew of US astronaut Scott Kelly and Russian cosmonauts Gennady Padalka and Mikhail Kornienko is scheduled to blast off to the ISS from Baikonur early on Friday.

TOPSHOTS The Soyuz TMA-14M spacecraft is...TOPSHOTS The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of NASA, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan on Thursday, March 12, 2015. NASA Astronaut Wilmore, Russian Cosmonauts Samokutyaev and Serova are returning after almost six months onboard the International Space Station where they served as members of the Expedition 41 and 42 crews.   AFP PHOTO / NASA / BILL INGALLS    == RESTRICTED TO EDITORIAL  USE / MANDATORY CREDIT:  "AFP PHOTO /   NASA / BILL INGALLS"/  NO A LA CARTE SALES  / NO MARKETING / NO ADVERTISING CAMPAIGNS / DISTRIBUTED AS A SERVICE TO CLIENTS ==BILL INGALLS/AFP/Getty Images

Bill Ingalls/AFP/Getty

The Soyuz TMA-14M spacecraft is seen as it lands with Expedition 42 commander Barry Wilmore of Nasa, Alexander Samokutyaev of the Russian Federal Space Agency (Roscosmos) and Elena Serova of Roscosmos near the town of Zhezkazgan, Kazakhstan. The crew are returning after almost six months on board the International Space Station where they served as members of the Expedition 41 and 42. 

This image released by NASA December 15,...This image released by NASA December 15, 2014 shows the easily recognized boot of Italy, with Sicily at its toe, spread across this panorama taken October 21 by astronauts aboard the International Space Station(ISS). On a clear night looking east, the pattern of night lights shows populations concentrated mainly along the coastlines, but also in the Po River Valley of northern Italy(L). Some of the brightest clusters of lights are Rome and nearby Naples, with island cities of Cagliari on Sardinia and Catania on Sicilynow well-known as the hometown of European Space Agency astronaut Luca Parmitano. The small, dark, circular patch dangerously close to Catania marks the unpopulated slopes of the active volcano Etna. Hazy lights, as over the Po valley and Rome, probably indicate thin clouds above. The island of Malta appears at the lower right. The airglow line is vivid in this night shot. AFP PHOTO / HANDOUT / NASA   == RESTRICTED TO EDITORIAL USE / MANDATORY CREDIT: "AFP PHOTO / HANDOUT / NASA  "/ NO MARKETING / NO ADVERTISING CAMPAIGNS / NO A LA CARTE SALES / DISTRIBUTED AS A SERVICE TO CLIENTS ==Handout/AFP/Getty Images

NASA/AFP/Getty

This image released by Nasa on Monday shows the easily recognised ‘boot of Italy‘, with Sicily at its toe. On a clear night looking east, the pattern of night lights shows populations concentrated mainly along the coastlines.

German Astronaut Alexander Gerst Aboard The International Space Station...IN SPACE - SEPTEMBER 9: (EDITORIAL USE ONLY) In this handout photo provided by the European Space Agency (ESA) on September 9, 2014, German ESA astronaut Alexander Gerst took this image of an aurora as he circled Earth whilst aboard the International Space Station (ISS). Gerst returned to earth on November 10, 2014 after spending six months on the International Space Station completing an extensive scientific programme, known as the 'Blue Dot' mission (after astronomer Carl Sagan's description of Earth, as seen on a photograph taken by the Voyager probe from six billion kilometres away). (Photo by Alexander Gerst / ESA via Getty Images)

ESA/Getty

In this handout photo provided by the European Space Agency (ESA).German ESA astronaut Alexander Gerst took this image of an aurora as he circled Earth whilst aboard the International Space Station (ISS). Gerst returned to earth on Monday after spending six months on the International Space Station completing an extensive scientific programme, known as the ‘Blue Dot’ mission (after astronomer Carl Sagan’s description of Earth, as seen on a photograph taken by the Voyager probe from six billion kilometres away). 

Ground personnel work on November 10, 20...Ground personnel work on November 10, 2014 next to the Soyuz TMA-13M capsule, carrying International Space Station (ISS) crew members of Alexander Gerst of Germany, Maxim Surayev of Russia and Reid Wiseman of the United States, after its landing near the town of Arkalyk in northern Kazakhstan. A veteran Russian cosmonaut and two International Space Station crewmates, one from the United States and one from Germany, returned safely to Earth on November 10 with a parachute landing of their Soyuz capsule in Kazakhstan, ending 5,5 months in orbit.    AFP PHOTO / POOL / SHAMIL ZHUMATOVSHAMIL ZHUMATOV/AFP/Getty Images

Shamil Zhumatov/AFP/Getty

Ground personnel work on the Soyuz TMA-13M capsule, carrying International Space Station crew members Alexander Gerst of Germany, Maxim Surayev of Russia and Reid Wiseman of the US, after its landing near the town of Arkalyk in northern Kazakhstan. 

NASA astronaut Reid Wiseman in the first of three spacewalks for the Expedition 41 crew aboard the International Space Station...NASA astronaut Reid Wiseman and European Space Agency astronaut Alexander Gerst (not shown) works outside the space station's Quest airlock in the first of three spacewalks for the Expedition 41 crew aboard the International Space Station in this image released October 8, 2014. The spacewalkers worked outside the space station's Quest airlock for 6 hours and 13 minutes, relocating a failed cooling pump to external stowage and installing gear that provides back up power to external robotics equipment.   REUTERS/Alexander Gerst/NASA/ESA/Handout  (OUTER SPACE - Tags: SCIENCE TECHNOLOGY TPX IMAGES OF THE DAY) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS

Alexander Gerst/NASA/ESA/Reuters

NASA astronaut Reid Wiseman and European Space Agency astronaut Alexander Gerst (not shown) works outside the space station’s Quest airlock in the first of three spacewalks for the Expedition 41 crew aboard the International Space Station.The spacewalkers worked outside the space station’s Quest airlock for 6 hours and 13 minutes, relocating a failed cooling pump to external stowage and installing gear that provides back up power to external robotics equipment. 

Baikonur cosmodrome in Kazakhstan...epaselect epa04417739 The Soyuz TMA 14 M blast off from Baikonur cosmodrome, Kazakhstan 26 September 2014, carrying members of the mission Russian cosmonauts Alexander Samokutyaev, Elena Serova and NASA astronaut Barry Wilmore to the International Space Station.  EPA/YURI KOCHETKOV

Yuri Kochetkov/EPA

The Soyuz TMA 14 M blast off from Baikonur cosmodrome, Kazakhstan carrying members of the mission Russian cosmonauts Alexander Samokutyaev, Elena Serova and NASA astronaut Barry Wilmore to the International Space Station.