Man-made climate change is an immediate concern, with a global warming apocalypse appearing increasingly likely. However the planet’s long-term prognosis is even more dire, because the sun will one day run out of fuel and expand, destroying the Earth in around five billion years. Moving the Earth to a wider orbit to escape this fiery oblivion may seem like a far-fetched solution, but an engineer has now outlined several theories for escaping this fate.

Scientists know the Sun will one day change from its current state to a red giant, a star far larger than its currently size.

I have come up with a thought experiment about what we could do with our current technology in order to move the orbit of Earth father away Dr Matteo Ceriotti

And this expansion will eventually reach Earth’s orbit, rendering it totally uninhabitable in around five billion years. However, in an extreme case of future planning, University of Glasgow space engineer Dr Matteo Ceriotti has proposed some radical solutions to help Earth change orbit. The proposals have to be extreme as, for example, the Earth’s mass is so large we do not have enough power to move the planet using conventional rocket propulsion. The radical ideas are loosely based on current technologies, although it is safe to assume any surviving humans will have significantly advanced science by then. READ MORE: Exomoons ‘may be home to extraterrestrial life’

Earth orbit: our world will one day need to be escape from being eaten by its dying Sun

Earth orbit: The sun will one day run out of fuel and expand into a white dwarf

Dr Ceriotti said: “I have come up with a thought experiment about what we could do with our current technology in order to move the orbit of Earth father away – say towards the orbit of Mars.” This is approximately 1.5 times the radius of Earth’s current orbit, in order to keep the Earth habitable in the future. One such idea is targeting asteroids which pass by Earth’s vicinity and then using the space rocks’ gravitational attraction to pull the orbit of the Earth away from its current location. Dr Ceriotti told Express.co.uk: “With this idea we would need a huge number of spacecraft to be able to fly to asteroids and then divert the asteroids into an orbit that passes within Earth’s vicinity. READ MORE: Royal Astronomical Society ‘concerned’ by Starlink constellation

“Another way would be to shoot the asteroid with an ion beam and the ion beam would push the asteroid away from its orbit. “Other methods involve simply landing on the asteroid and then turning on a rocket on its surface in order to eject material – this is called a mass drive. “Or we could deploy a constellation of mirrors around the asteroid and the mirrors would reflect the Sun’s light onto its surface. “The surface of the asteroid would sublimate, or turn into gas and this gas would provide the force to move the asteroid away. READ MORE: NASA discovers remnants of ancient polar ice cap on Mars

Earth orbit: There are several options available for moving Earth to a wider orbit

Earth orbit: Dr Matteo Ceriotti has proposed some radical solutions to help Earth change orbit

“But the simplest one is simply impacting the asteroid with a spacecraft, and this is called a kinetic impactor.” But asteroids are not the only available option, although they would be involved in building a solar sail, a large reflective sheet that captures the momentum of light from the Sun and use that momentum to push the planet forward. However, explains Dr Ceriotti, its required size would be huge – several times the diameter of the earth. He said: “At the moment we cannot even envisage how we could built such a large solar sail on the ground and then send it into space, where it would be deployed. “But in the future we may develop technologies in which we can actually built structures direct in space.