NASA

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.

NASA Prepares For Orion Test Launch...CAPE CANAVERAL, FL - DECEMBER 05:  In this handout provided by National Aeronautics and Space Administration (NASA), Bright lights illuminate the United Launch Alliance Delta IV Heavy rocket with NASA's Orion spacecraft mounted on top is seen in the early hours of the morning atCape Canaveral Air Force Station's Space Launch Complex 37 on Decemeber 05, 2014 at Cape Canaveral, Florida. Orion is scheduled to launch and make its first flight test later in the morning. The spacecraft will orbit Earth twice, reaching an altitude of approximately 3,600 miles above Earth before landing in the Pacific Ocean. No one will be aboard Orion for this flight test, but the spacecraft is designed to allow us to journey to destinations never before visited by humans, including an asteroid and Mars. (Photo by Bill Ingalls/NASA via Getty Images)

Bill Ingalls/Getty/NASA

Lights illuminate the Delta IV rocket that blasted the Orion spacecraft into space at 7.05am US eastern time on Friday at Cape Canaveral, Florida. The spacecraft will orbit Earth twice, reaching an altitude of about 3,600 miles above Earth before landing in the Pacific Ocean 

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