NASA

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. 

A nighttime view of Europe using the Visible Infrared Imaging Radiometer Suite in seen in a NASA handout...A nighttime view of Europe made possible by the ìday-night bandî of the Visible Infrared Imaging Radiometer Suite (VIIRS) is seen in a global composite assembled from data acquired by the Suomi National Polar-orbiting Partnership (Suomi NPP) satellite in 2012 and released by NASA October 2, 2014 .  The VIIRS detects light in a range of wavelengths from green to near-infrared and uses filtering techniques to observe dim signals such as city lights, wildfires, and gas flares.   REUTERS/NASA/Handout  (UNITED STATES - Tags: ENVIRONMENT ENERGY SCIENCE TECHNOLOGY) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS

Nasa/Reuters

A night time view of Europe made possible by the iday-night bandi of the Visible Infrared Imaging Radiometer Suite (VIIRS) is seen in a global composite assembled from data acquired by the Suomi National Polar-orbiting Partnership satellite. 

Earth seen from the International Space Station...epa04383191 A handout picture made available by NASA on 04 September 2014 shows a view of Earth taken by NASA astronaut Gregory Reid Wiseman of the US from the International Space Station (ISS) on space, 02 September 2014. The Expedition 40 crew has been busy on the ISS performing health checks and humanoid robot upgrades. A trio of orbital residents is packing up gear as they prepare to return home in less than two weeks. Commander Steve Swanson powered down and stowed Robonaut 2 after wrapping up its mobility upgrades this week. He installed new legs on the humanoid robot including external and internal gear as well as cables. This sets the stage for more upgrades in the fall before Robonaut takes its first steps as an assistant crew member. Robonaut was designed to enhance crew productivity and safety while also aiding people on Earth with physical disabilities.  EPA/NASA/REID WISEMAN  HANDOUT EDITORIAL USE ONLY

Reid Wiseman/Nasa/Epa

A view of earth taken by Nasa astronaut Gregory Reid Wiseman from the International Space Station, where the Expedition 40 crew have been performing health checks and humanoid robot upgrades 

Mars Rover Curiosity...In this image released on June 23, 2014,  shows NASA's Curiosity Mars rover self-portrait. NASA's Curiosity Mars used the camera at the end of its arm in April and May 2014 to take dozens of component images combined into this self-portrait where the rover drilled into a sandstone target called "Windjana." NASAís Mars Curiosity rover will complete a Martian year, 687 Earth days, on June 24. (AP Photo/NASA/JPL-Caltech/MSSS)

NASA/JPL-Caltech/MSSS/AP

This image shows a self-portrait of Nasa’s Mars Curiosity rover. The rover used the camera at the end of its arm in April and May 2014 to take dozens of component images combined into this self-portrait where it drilled into a sandstone target called “Windjana”. Mars Curiosity will complete a Martian year – 687 Earth days – on June 24. 

Russian cosmonauts complete spacewalk...epa04268342 A handout picture released via NASA astronaut Reid Wiseman's twitter account on 20 June 2014 shows Russian cosmonauts Alexander Skvortsov and Oleg Artemyev during a spacewalk outside the International Space Station (ISS), 19 June 2014. According to NASA, Russian cosmonauts Alexander Skvortsov and Oleg Artemyev completed a spacewalk outside the Russian segment of the ISS where they installed a communications system antenna and conducted experiments. The spacewalk lasted 7 hours and 23 minutes.  EPA/REID WISEMAN / NASA / HANDOUT  HANDOUT EDITORIAL USE ONLY

Reid Wiseman/NASA/EPA

A handout picture released via NASA astronaut Reid Wiseman’s twitter account on 20 shows Russian cosmonauts Alexander Skvortsov and Oleg Artemyev during a spacewalk outside the International Space Station (ISS). According to NASA, Russian cosmonauts Alexander Skvortsov and Oleg Artemyev completed a spacewalk outside the Russian segment of the ISS where they installed a communications system antenna and conducted experiments. The spacewalk lasted 7 hours and 23 minutes 

Egyptian desert meets the Red Sea on a cloudless afternoon in this photo tweeted by first-time astronaut Reid Wiseman...The Egyptian desert meets the Red Sea on a cloudless afternoon in this photo tweeted by first-time astronaut Reid Wiseman on June 8, 2014. Wiseman is one of six men living aboard the International Space Station. Wiseman is sharing his observations and pictures with a growing following on Twitter.  REUTERS/Reid Wiseman/NASA/Handout via Reuters  (OUTER SPACE - Tags: ENVIRONMENT SCIENCE TECHNOLOGY TPX IMAGES OF THE DAY) ATTENTION EDITORS - FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS IMAGE. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS

NASA/Reuters

The Egyptian desert meets the Red Sea on a cloudless afternoon in this photo tweeted by first-time astronaut Reid Wiseman. Wiseman is one of six men living aboard the International Space Station. Wiseman is sharing his observations and pictures with a growing following on Twitter. 

A total lunar eclipse takes place in the...A total lunar eclipse takes place in the sky over the Mexican city of Guadalajara early on April 15, 2014. The entire event was to be visible from North and South America, but sky watchers in northern and and eastern Europe, eastern Africa, the Middle East and Central Asia were out of luck, according to US space agency NASA.     AFP PHOTO / Hector GuerreroHECTOR GUERRERO/AFP/Getty Images

Hector Guerrero/AFP

A total lunar eclipse takes place in the sky over the Mexican city of Guadalajara early on Tuesday. The event was to be visible from North and South America, but sky watchers in northern and eastern Europe, eastern Africa, the Middle East and Central Asia were not as lucky, according to US space agency Nasa. 

This image provided by NASA March 16, 2014 shows a portion of the Florida Keys taken by Astronaut Rick Mastracchio from the International Space Station. (AP Photo/NASA, Rich Mastracchio)

Rich Mastracchio/Nasa/AP

This image provided by NASA shows a portion of the Florida Keys taken by Astronaut Rick Mastracchio from the International Space Station 

Landing of the Soyuz TMA-10M Spacecraft...ZHEZKAZGAN, KAZAHSTAN - MARCH 11: In this handout provided by NASA, Expedition 38 Flight Engineer Sergey Ryazanskiy of the Russian Federal Space Agency, Roscosmos, is helped out of the Soyuz Capsule just minutes after he and Commander Oleg Kotov of the Roscosmos, and, Flight Engineer Mike Hopkins of NASA (not pictured) landed in their Soyuz TMA-10M spacecraft on March 11 near the town of Zhezkazgan, Kazakhstan. Hopkins, Kotov and Ryazanskiy returned to Earth after five and a half months onboard the International Space Station where they served as members of the Expedition 37 and 38 crews.

Bill Ingalls/NASA/Getty

Flight engineer Sergey Ryazanskiy of the Russian Federal Space Agency, Roscosmos, is helped out of the Soyuz Capsule just minutes after he and Commander Oleg Kotov of the Roscosmos landed on Tuesday near the town of Zhezkazgan, Kazakhstan. They returned to Earth after five and a half months on board the International Space Station. 

Martian dune valley...epa04054024 A handout picture made available by NASA on 04 February 2014 show a view combining several frames taken by the Mast Camera (Mastcam) on NASA's Mars rover Curiosity, looking into a dune valley on Mars, 30 January 2014. The team operating Curiosity has chosen this valley as a likely route toward mid-term and long-term science destinations. The foreground dune, at a location called 'Dingo Gap', is about one meter high in the middle and tapered at south and north ends onto low scarps on either side of the gap. The center of the view is about ten degree south of straight west. The left edge is about 20 degree west of straight south. The right edge is northwest. The largest of the dark rocks on the sand in the right half of the scene are about 60 cm across. The image has been white-balanced to show what the rocks would look like if they were on Earth. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology, Pasadena, USA, manages the Mars Science Laboratory Project for NASA's Science Mission Directorate, Washington. The Jet Propulsion Laboratory (JPL) designed and built the project's Curiosity rover. Malin Space Science Systems, San Diego, California, USA, built and operates the rover's Mastcam.

EPA/Nasa

A Nasa picture shows several frames of a dune valley on Mars, taken by the Mastcam on the rover Curiosity. The foreground dune at Dingo Gap is about 1 metre high in the middle and tapered at south and north ends onto low scarps on either side of the gap. The image has been white-balanced to show what the rocks would look like if they were on Earth.