The cosmologist and physicist will leave the Earth on board Richard Branson's spaceship, he has said.
Professor Hawking told Good Morning Britain that he'd never dreamed he'd be able to head into space. But "Richard Branson has offered me a seat on Virgin Galactic, and I said yes immediately", he said.
Nasa's most stunning pictures of space
Nasa's most stunning pictures of space
1/30 Earth from the ISS
From the International Space Station, Expedition 42 Flight Engineer Terry W. Virts took this photograph of the Gulf of Mexico and U.S. Gulf Coast at sunset
Nasa
2/30 Frosty slopes of Mars
This image of an area on the surface of Mars, approximately 1.5 by 3 kilometers in size, shows frosted gullies on a south-facing slope within a crater. The image was taken by Nasa's HiRISE camera, which is mounted on its Mars Reconaissance Orbiter
Nasa
3/30 Orion Capsule splashes down
The Orion capsule jetted off into space before heading back a few hours later — having proved that it can be used, one day, to carry humans to Mars
Nasa
4/30 The Soyuz TMA-15M rocket launch
The Soyuz TMA-15M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Monday, Nov. 24, 2014, carrying three new astronauts to the International Space Station. It also took caviar, ready for the satellite's inhabitants to celebrate the holidays
Nasa
5/30 Yellowstone from space
NASA astronaut Reid Wiseman shared this image of Yellowstone via his twitter account
Nasa
6/30 Black Hole Friday
Nasa celebrated Black Friday by looking into space instead — sharing pictures of black holes
Nasa
7/30 NuSTAR
X-rays stream off the sun in this image showing observations from by NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, overlaid on a picture taken by NASA's Solar Dynamics Observatory (SDO)
Nasa
8/30 Saturn
This near-infrared color image shows a specular reflection, or sunglint, off of a hydrocarbon lake named Kivu Lacus on Saturn's moon Titan
Nasa
9/30 Worlds Apart
Although Mimas and Pandora, shown here, both orbit Saturn, they are very different moons. Pandora, "small" by moon standards (50 miles or 81 kilometers across) is elongated and irregular in shape. Mimas (246 miles or 396 kilometers across), a "medium-sized" moon, formed into a sphere due to self-gravity imposed by its higher mass
Nasa
10/30 Solar Flare
An X1.6 class solar flare flashes in the middle of the sun in this image taken 10 September, captured by NASA's Solar Dynamics Observatory
Nasa
11/30 Solar Flare
An image from Nasa's Solar Dynamics Observatory (SDO) shows a 200,000 mile long solar filament ripping through the Sun's corona in September 2013
Nasa
12/30 Cassiopeia A c
A false colour image of Cassiopeia A comprised with data from the Spitzer and Hubble Space Telescopes and the Chandra X-Ray observatory
Nasa
13/30 Large Magellanic Cloud galaxy
An image of the Large Magellanic Cloud galaxy seen in infrared light by the Herschel Space Observatory. Regions of space such as this are where new stars are born from a mixture of elements and cosmic dust
Nasa
14/30 Mars Rover Spirit
Nasa's Mars Rover Spirit took the first picture from Spirit since problems with communications began a week earlier. The image shows the robotic arm extended to the rock called Adirondack
Nasa
15/30 Morning Aurora From the Space Station
Nasa astronaut Scott Kelly captured this photograph of the green lights of the aurora from the International Space Station
16/30 Launch of History - Making STS-41G Mission in 1984
The Space Shuttle Challenger launches from Florida at dawn. On this mission, Kathryn Sullivan became the first U.S. woman to perform a spacewalk and Marc Garneau became the first Canadian in space. The crew of seven was the largest to fly on a spacecraft at that time, and STS-41G was the first flight to include two female astronauts
17/30 A Fresh Perspective on an Extraordinary Cluster of Galaxies
Galaxy clusters are often described by superlatives. After all, they are huge conglomerations of galaxies, hot gas, and dark matter and represent the largest structures in the Universe held together by gravity
18/30 Veil Nebula Supernova Remnant
Nasa's Hubble Space Telescope has unveiled in stunning detail a small section of the Veil Nebula - expanding remains of a massive star that exploded about 8,000 years ago
19/30 Hubble Sees a Galactic Sunflower
The arrangement of the spiral arms in the galaxy Messier 63, seen here in an image from the Nasa Hubble Space Telescope, recall the pattern at the center of a sunflower
20/30 A Hubble Cosmic Couple
The spectacular cosmic pairing of the star Hen 2-427 — more commonly known as WR 124 — and the nebula M1-67 which surrounds it
21/30 Pluto image
Four images from New Horizons’ Long Range Reconnaissance Imager (LORRI) were combined with colour data from the Ralph instrument to create this enhanced colour global view of Pluto
22/30 Fresh Crater Near Sirenum Fossae Region of Mars
The HiRISE camera aboard Nasa's Mars Reconnaissance Orbiter acquired this closeup image of a "fresh" (on a geological scale, though quite old on a human scale) impact crater in the Sirenum Fossae region of Mars. This impact crater appears relatively recent as it has a sharp rim and well-preserved ejecta
23/30 Earth Observations From Gemini IV in 1965
This photograph of the Florida Straits and Grand Bahama Bank was taken during the Gemini IV mission during orbit no. 19 in 1965. The Gemini IV crew conducted scientific experiments, including photography of Earth's weather and terrain, for the remainder of their four-day mission following Ed White's historic spacewalk on June 3
24/30 Nasa Celebrates 50 Years of Spacewalking
For 50 years, NASA has been "suiting up" for spacewalking. In this 1984 photograph of the first untethered spacewalk, NASA astronaut Bruce McCandless is in the midst of the first "field" tryout of a nitrogen-propelled backpack device called the Manned Maneuvering Unit (MMU)
25/30 Hubble Peers into the Most Crowded Place in the Milky Way
This Nasa Hubble Space Telescope image presents the Arches Cluster, the densest known star cluster in the Milky Way
26/30 An Astronaut's View from Space
Nasa astronaut Reid Wiseman tweeted this photo from the International Space Station on 2 September 2014
27/30 Giant Landform on Mars
On Mars, we can observe four classes of sandy landforms formed by the wind, or aeolian bedforms: ripples, transverse aeolian ridges, dunes, and what are called “draa”
28/30 Expedition 39 Landing
A sokol suit helmet can be seen against the window of the Soyuz TMA-11M capsule shortly after the spacecraft landed with Expedition 39 Commander Koichi Wakata of the Japan Aerospace Exploration Agency (JAXA), Soyuz Commander Mikhail Tyurin of Roscosmos, and Flight Engineer Rick Mastracchio of NASA near the town of Zhezkazgan, Kazakhstan
29/30 Jupiter's Great Red Spot Viewed by Voyager I
30/30 Chandra Observatory Sees a Heart in the Darkness
1/30 Earth from the ISS
From the International Space Station, Expedition 42 Flight Engineer Terry W. Virts took this photograph of the Gulf of Mexico and U.S. Gulf Coast at sunset
Nasa
2/30 Frosty slopes of Mars
This image of an area on the surface of Mars, approximately 1.5 by 3 kilometers in size, shows frosted gullies on a south-facing slope within a crater. The image was taken by Nasa's HiRISE camera, which is mounted on its Mars Reconaissance Orbiter
Nasa
3/30 Orion Capsule splashes down
The Orion capsule jetted off into space before heading back a few hours later — having proved that it can be used, one day, to carry humans to Mars
Nasa
4/30 The Soyuz TMA-15M rocket launch
The Soyuz TMA-15M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Monday, Nov. 24, 2014, carrying three new astronauts to the International Space Station. It also took caviar, ready for the satellite's inhabitants to celebrate the holidays
Nasa
5/30 Yellowstone from space
NASA astronaut Reid Wiseman shared this image of Yellowstone via his twitter account
Nasa
6/30 Black Hole Friday
Nasa celebrated Black Friday by looking into space instead — sharing pictures of black holes
Nasa
7/30 NuSTAR
X-rays stream off the sun in this image showing observations from by NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, overlaid on a picture taken by NASA's Solar Dynamics Observatory (SDO)
Nasa
8/30 Saturn
This near-infrared color image shows a specular reflection, or sunglint, off of a hydrocarbon lake named Kivu Lacus on Saturn's moon Titan
Nasa
9/30 Worlds Apart
Although Mimas and Pandora, shown here, both orbit Saturn, they are very different moons. Pandora, "small" by moon standards (50 miles or 81 kilometers across) is elongated and irregular in shape. Mimas (246 miles or 396 kilometers across), a "medium-sized" moon, formed into a sphere due to self-gravity imposed by its higher mass
Nasa
10/30 Solar Flare
An X1.6 class solar flare flashes in the middle of the sun in this image taken 10 September, captured by NASA's Solar Dynamics Observatory
Nasa
11/30 Solar Flare
An image from Nasa's Solar Dynamics Observatory (SDO) shows a 200,000 mile long solar filament ripping through the Sun's corona in September 2013
Nasa
12/30 Cassiopeia A c
A false colour image of Cassiopeia A comprised with data from the Spitzer and Hubble Space Telescopes and the Chandra X-Ray observatory
Nasa
13/30 Large Magellanic Cloud galaxy
An image of the Large Magellanic Cloud galaxy seen in infrared light by the Herschel Space Observatory. Regions of space such as this are where new stars are born from a mixture of elements and cosmic dust
Nasa
14/30 Mars Rover Spirit
Nasa's Mars Rover Spirit took the first picture from Spirit since problems with communications began a week earlier. The image shows the robotic arm extended to the rock called Adirondack
Nasa
15/30 Morning Aurora From the Space Station
Nasa astronaut Scott Kelly captured this photograph of the green lights of the aurora from the International Space Station
16/30 Launch of History - Making STS-41G Mission in 1984
The Space Shuttle Challenger launches from Florida at dawn. On this mission, Kathryn Sullivan became the first U.S. woman to perform a spacewalk and Marc Garneau became the first Canadian in space. The crew of seven was the largest to fly on a spacecraft at that time, and STS-41G was the first flight to include two female astronauts
17/30 A Fresh Perspective on an Extraordinary Cluster of Galaxies
Galaxy clusters are often described by superlatives. After all, they are huge conglomerations of galaxies, hot gas, and dark matter and represent the largest structures in the Universe held together by gravity
18/30 Veil Nebula Supernova Remnant
Nasa's Hubble Space Telescope has unveiled in stunning detail a small section of the Veil Nebula - expanding remains of a massive star that exploded about 8,000 years ago
19/30 Hubble Sees a Galactic Sunflower
The arrangement of the spiral arms in the galaxy Messier 63, seen here in an image from the Nasa Hubble Space Telescope, recall the pattern at the center of a sunflower
20/30 A Hubble Cosmic Couple
The spectacular cosmic pairing of the star Hen 2-427 — more commonly known as WR 124 — and the nebula M1-67 which surrounds it
21/30 Pluto image
Four images from New Horizons’ Long Range Reconnaissance Imager (LORRI) were combined with colour data from the Ralph instrument to create this enhanced colour global view of Pluto
22/30 Fresh Crater Near Sirenum Fossae Region of Mars
The HiRISE camera aboard Nasa's Mars Reconnaissance Orbiter acquired this closeup image of a "fresh" (on a geological scale, though quite old on a human scale) impact crater in the Sirenum Fossae region of Mars. This impact crater appears relatively recent as it has a sharp rim and well-preserved ejecta
23/30 Earth Observations From Gemini IV in 1965
This photograph of the Florida Straits and Grand Bahama Bank was taken during the Gemini IV mission during orbit no. 19 in 1965. The Gemini IV crew conducted scientific experiments, including photography of Earth's weather and terrain, for the remainder of their four-day mission following Ed White's historic spacewalk on June 3
24/30 Nasa Celebrates 50 Years of Spacewalking
For 50 years, NASA has been "suiting up" for spacewalking. In this 1984 photograph of the first untethered spacewalk, NASA astronaut Bruce McCandless is in the midst of the first "field" tryout of a nitrogen-propelled backpack device called the Manned Maneuvering Unit (MMU)
25/30 Hubble Peers into the Most Crowded Place in the Milky Way
This Nasa Hubble Space Telescope image presents the Arches Cluster, the densest known star cluster in the Milky Way
26/30 An Astronaut's View from Space
Nasa astronaut Reid Wiseman tweeted this photo from the International Space Station on 2 September 2014
27/30 Giant Landform on Mars
On Mars, we can observe four classes of sandy landforms formed by the wind, or aeolian bedforms: ripples, transverse aeolian ridges, dunes, and what are called “draa”
28/30 Expedition 39 Landing
A sokol suit helmet can be seen against the window of the Soyuz TMA-11M capsule shortly after the spacecraft landed with Expedition 39 Commander Koichi Wakata of the Japan Aerospace Exploration Agency (JAXA), Soyuz Commander Mikhail Tyurin of Roscosmos, and Flight Engineer Rick Mastracchio of NASA near the town of Zhezkazgan, Kazakhstan
29/30 Jupiter's Great Red Spot Viewed by Voyager I
30/30 Chandra Observatory Sees a Heart in the Darkness
Richard Branson's spaceflight company, Virgin Galactic, hopes soon to carry people into space on commercial missions. Mr Branson had suggested that he might be able to complete a flight in 2009, but the plan has been thrown off by a range of problems and disasters.
In a wide-ranging interview, he said that his "three children have brought me great joy - and I can tell you what will make me happy, to travel in space".
Professor Hawking also discussed Donald Trump, who he said was a "demagogue" and made him fear that he might never be welcome in the US. ""His priority will be to satisfy his electorate who are neither liberal, nor that well-informed," he said.
He also criticised Jeremy Corbyn, who he said had allowed himself to be portrayed "a left-wing extremist, which he’s not". Because of the media portrayals, he said there was not much chance that Mr Corbyn would ever win an election, but that he would continue to support the Labour party.
And he said that if Brexit must happen, it can't happen in the "isolated and inward-looking" way that "the right wing of the Conservative Party want". He warned politicians that they should ensure that Britain keeps as many links as possible with Europe and the rest of the world, and said that leaving Europe "threatens Britain’s status as a world-leader in science and innovation".
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