NASA

Embargoed until April 21, 2016 - 15:00 G...Embargoed until April 21, 2016 - 15:00 GMT / A handout photo released by the European Space Agency shows the Bubble Nebula, also known as NGC 7653, which is an emission nebula located 11 000 light-years away.  This stunning new image was observed by the NASA/ESA Hubble Space Telescope to celebrate its 26th year in space. / AFP PHOTO / ESA/Hubble / STR / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / ESA/NASA/Hubble Heritage Team" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS / EMBARGOED UNTIL April 21, 2016, 17:00 CESTSTR/AFP/Getty Images

ESA/NASA/Hubble Heritage Team/AFP

This photo released by the European Space Agency shows the Bubble Nebula, also known as NGC 7653, which is an emission nebula located 11 000 light-years away. This stunning new image was observed by the NASA/ESA Hubble Space Telescope to celebrate its 26th year in space 

This NASA image obtained April 15, 2016 ...This NASA image obtained April 15, 2016 shows The spider part of The Spider and the Fly" nebulae, IC 417 in star formation, as seen in this infrared image from NASA's Spitzer Space Telescope and the Two Micron All Sky Survey (2MASS).  Located in the constellation Auriga, IC 417 lies about 10,000 light-years away. It is in the outer part of the Milky Way, almost exactly in the opposite direction from the galactic center. A cluster of young stars called "Stock 8" can be seen (centerR). The light from this cluster carves out a bowl in the nearby dust clouds, seen here as green fluff. Along the sinuous tail in the center and to the left, groupings of red point sources are also young stars. In this image, infrared wavelengths, which are invisible to the unaided eye, have been assigned visible colors. Light with a wavelength of 1.2 microns, detected by 2MASS, is shown in blue. The Spitzer wavelengths of 3.6 and 4.5 microns are green and red, respectively.  / AFP PHOTO / NASA/JPL-CALTECH/2MASS / Handout / XGTY/RESTRICTED TO EDITORIAL USE-MANDATORY CREDIT"AFP PHOTO/NASA/JPL-CALTECH/2MASS"- NO MARKETING NO ADVERTISING CAMPAIGNS-DISTRBUTED AS A SERVICE TO CLIENTSHANDOUT/AFP/Getty Images

NASA/AFP/Getty

The spider part of The Spider and the Fly nebulae, IC 417 in star formation, as seen in this infrared image. Located in the constellation Auriga, IC 417 lies about 10,000 light-years away. It is in the outer part of the Milky Way, almost exactly in the opposite direction from the galactic centre. 

The plane carrying Expedition 46 Commander Scott Kelly of NASA is seen as it taxis after landing at Ellington Field after his return to Earth

Joel Kowsky/NASA via Getty Images

The plane carrying Expedition 46 Commander Scott Kelly of NASA is seen as it taxis after landing at Ellington Field after his return to Earth

An H-2A rocket carrying the ASTRO-H sate...An H-2A rocket carrying the ASTRO-H satellite, developed in collaboration between the Japan Aerospace Exploration Agency (JAXA), NASA and other groups, lifts off at the Tanegashima Space Center in Kagoshima Prefecture, southwestern Japan on February 17, 2016. Japan successfully launched a jointly developed space observation satellite on February 17 tasked with studying mysterious black holes, the country's space agency said.

Jiji Press/AFP

An H-2A rocket carrying the ASTRO-H satellite, developed in collaboration between the Japan Aerospace Exploration Agency (JAXA), NASA and other groups, lifts off at the Tanegashima Space Center in Kagoshima Prefecture, southwestern Japan

NASA successfully deploys two combined satellites from Texas universities...epa05140040 A handout image dated 29 January 2016 and made available by ESA/NASA on 02 February 2016, showing an image made by Expedition 46 flight engineer Tim Peake of ESA aboard the International Space Station, as the robotic arm in Japan's Kibo laboratory successfully deployed two combined satellites from Texas universities. The pair of satellites -- AggieSat4 built by Texas A&M University students, and BEVO-2 built by University of Texas students -- together form the Low Earth Orbiting Navigation Experiment for Spacecraft Testing Autonomous Rendezvous and Docking (LONESTAR) investigation.  EPA/TIM PEAKE / ESA / NASA /

Tim Peake/ESA/Nasa/EPA

Japan’s Kibo laboratory’s robotic arm successfully deploys two combined satellites built built by Texas A&M University students. Photo taken by Expedition 46 flight engineer Tim Peake of ESA aboard the International Space Station 

London seen from space

Tim Peake/ESA/NASA

Astronaut Tim Peake’s photo of London viewed from the space station

A refugee woman holds a baby on a beach as the others try to sail off for the Greek island of Chios from the western Turkish coastal town of Cesme...A refugee woman holds a baby on a beach as the others try to sail off for the Greek island of Chios from the western Turkish coastal town of Cesme, in Izmir province, Turkey, November 4, 2015.  REUTERS/Umit Bektas

Umit Bektas/Reuters

A refugee holds a baby on a beach as the others try to sail off for the Greek island of Chios from the western Turkish coastal town of Cesme, Turkey 

Expedition 45 Commander Scott Kelly's spacewalk selfie...epa05003126 A handout picture released 30 October 2015 and dated 28 October 2015, provided by NASA, shows Expedition 45 Commander Scott Kelly during a spacewalk. Sharing the image on social media, Kelly wrote, '#SpaceWalkSelfie Back on the grid! Great first spacewalk yesterday. Now on to the next one next week. #YearInSpace'. According to NASA, this was the first spacewalk for both Kelly and Flight Engineer Kjell Lindgren; the two will venture outside the International Space Station for the second time on 06 November 2015.  EPA/NASA / SCOTT KELLY / HANDOUT  HANDOUT EDITORIAL USE ONLY

Scott Kelly/NASA/EPA

Expedition 45 Commander Scott Kelly takes a selfie during a spacewalk. According to NASA, this was the first spacewalk for both Kelly and Flight Engineer Kjell Lindgren 

Startling images of Pluto from New Horizons...SOL SYSTEM Pluto -- 11 Sep 2015 -- This synthetic perspective view of Pluto, based on the latest high-resolution images to be downlinked from NASAís New Horizons spacecraft, shows what you would see if you were approximately 1,100 miles (1,800 kilometers) above Plutoís equatorial area, looking northeast over the dark, cratered, informally named Cthulhu Regio toward the bright, smooth, expanse of icy plains informally called Sputnik Planum. The entire expanse of terrain seen in this image is 1,100 miles (1,800 kilometers) across. The images were taken as New Horizons flew past Pluto on July 14, 2015, from a distance of 50,000 miles (80,000 kilometers) -- Picture by Atlas Photo Archive/JHUAPL/SwRI/NASA

Atlas Photo Archive/NASA

This synthetic perspective view of Pluto, based on the latest high-resolution images to be downlinked from NASA‘s New Horizons spacecraft.

low-angle self-portrait of NASA's Curiosity Mars rover...epa04890875 A handout picture released by NASA on 20 August 2015 shows a low-angle self-portrait of NASA's Curiosity Mars rover  vehicle above the 'Buckskin' rock target, in the 'Marias Pass' area of lower Mount Sharp on Mars, where the mission collected its seventh drilled sample, taken on 05 August 2015. The scene combines dozens of images taken by Curiosity's Mars Hand Lens Imager (MAHLI) during the 1,065th Martian day, or sol, of the rover's work on Mars. For scale, the rover's wheels are 20 inches (50 centimeters) in diameter and about 16 inches (40 centimeters) wide.  EPA/NASA/JPL-Caltech/MSSS  HANDOUT EDITORIAL USE ONLY

JPL-Caltech/NASA//MSSS/EPA

A picture released by NASA shows a low-angle self-portrait of NASA‘s Curiosity Mars rover vehicle above the ‘Buckskin’ rock target, in the ‘Marias Pass’ area of lower Mount Sharp on Mars, where the mission collected its seventh drilled sample 

Hurricane Danny, the first hurricane of the 2015 Atlantic season, is seen in this picture by NASA astronaut Scott Kelly taken from the International Space Station August 20, 2015.

Scott Kelly/NASA/Reuters

Hurricane Danny, the first hurricane of the 2015 Atlantic season, is seen in this picture by NASA astronaut Scott Kelly taken from the International Space Station on Thursday

A meteor streaks across the sky over Leeberg hill during the Perseid meteor shower near Grossmugl...ATTENTION EDITORS - REUTERS PICTURE HIGHLIGHTA meteor streaks across the sky over Leeberg hill during the Perseid meteor shower near Grossmugl in the early morning of August 13, 2015. The annual Perseid meteor shower reaches its peak on August 12 and 13 in Europe, according to NASA. REUTERS/Heinz-Peter Bader       TPX IMAGES OF THE DAYREUTERS NEWS PICTURES HAS NOW MADE IT EASIER TO FIND THE BEST PHOTOS FROM THE MOST IMPORTANT STORIES AND TOP STANDALONES EACH DAY. Search for "TPX" in the IPTC Supplemental Category field or "IMAGES OF THE DAY" in the Caption field and you will find a selection of 80-100 of our daily Top Pictures.REUTERS NEWS PICTURES. TEMPLATE OUT

Heinz-Peter Bader/Reuters

A meteor streaks across the sky over Leeberg hill during the Perseid meteor shower near Grossmugl early on Thursday. The annual Perseid meteor shower reaches its peak on Wednesday and Thursday in Europe, according to NASA. 

TOPSHOTS NASA and project staff react wi...TOPSHOTS NASA and project staff react with others as telemetry is received from the New Horizons probe at the Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland on July 14, 2015. The New Horizons interplanetary space probe reestablished contact with NASA after safe passage completing its closest approach fly-by of Pluto making the United States the first to explore the dwarf planet. AFP PHOTO/BRENDAN SMIALOWSKIBRENDAN SMIALOWSKI/AFP/Getty Images

Brendan Smialowski/AFP/Getty

NASA and project staff react with others as telemetry is received from the New Horizons probe at the Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland. The New Horizons interplanetary space probe reestablished contact with NASA after safe passage completing its closest approach fly-by of Pluto making the United States the first to explore the dwarf planet. 

This undated photo provided by NASA shows an image taken by the Hubble Space Telescope showing a giant star cluster in the Constellation Carina, about 20,000 light years from Earth. Friday, April 24, 2015, marks the 25th anniversary of Hubble's launch

NASA/ESA/Hubble Heritage Team/AP

NASA shows an image taken by the Hubble Space Telescope showing a giant star cluster in the Constellation Carina, about 20,000 light years from Earth. Friday marks the 25th anniversary of Hubble’s launch

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 

 the United Launch Alliance Atlas V rocket with NASA's Magnetospheric Multiscale (MMS) spacecraft onboard launches from the Air Force Station Space Launch Complex 41 March 12, 2015 in Cape Canaveral, Florida. NASA's MMS mission will study how magnetic fields around Earth connect and disconnect, explosively releasing energy via a process known as magnetic reconnection. MMS consists of four identical spacecraft that work together to provide the first three-dimensional view of this fundamental process, which occurs throughout the universe.

Aubrey Gemignani/NASA via Getty Images

the United Launch Alliance Atlas V rocket with NASA’s Magnetospheric Multiscale (MMS) spacecraft onboard launches from the Air Force Station Space Launch Complex 41 in Cape Canaveral, Florida. NASA’s MMS mission will study how magnetic fields around Earth connect and disconnect, explosively releasing energy via a process known as magnetic reconnection. MMS consists of four identical spacecraft that work together to provide the first three-dimensional view of this fundamental process, which occurs throughout the universe.

Massive star explosion in the Large Magellanic Cloud...epa04586376 A undated handout image made available by NASA on 26 January 2015 showing an expanding shell of debris called SNR 0519-69.0 is left behind after a massive star exploded in the Large Magellanic Cloud, a satellite galaxy to the Milky Way. Multimillion degree gas is seen in X-rays from Chandra, in blue. The outer edge of the explosion (red) and stars in the field of view are seen in visible light from the Hubble Space Telescope. Chandra X-ray Center is releasing a set of images that combine data from telescopes tuned to different wavelengths of light.  EPA/NASA / CXC / SAO  HANDOUT EDITORIAL USE ONLY

Nasa/EPA

This Nasa image shows an expanding shell of debris left behind after a massive star exploded in the Large Magellanic Cloud, a satellite galaxy to the Milky Way. Multimillion degree gas is seen in X-rays from Chandra, in blue. The outer edge of the explosion (red) and stars in the field of view are seen in visible light from the Hubble Space Telescope. 

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.