ITV News speaks to the British men and women shortlisted for a mission to establish a human colony on Mars.
India has successfully launched a controversial space rocket which it hopes to use to reach Mars.
Mars has been identified as the "best bet" for human life when soaring temperatures on Earth make it inhabitable.
The Mars Curiosity Rover has tweeted an image of the twilight sky and Martian horizon which includes Earth as the brightest point of light in the night sky.
Earth sits left of centre in the picture, with moon is just below.
The view was captured about 80 minutes after sunset on the 529th Martian day, or sol, of the rover's work on Mars (31st January 2014). The image has been processed to remove effects of cosmic rays.
A human observer with normal vision, if standing on Mars, could easily see Earth and the moon as two distinct, bright "evening stars."
A mission to put humans on Mars has whittled a list of 200,000 applicants down to 1,058 candidates who will now be tested to come up with a final list of 24 would-be Mars-dwellers.
Mars One was set up in 2011 by two Dutch men with the goal of establishing permanent human life on Mars by 2025.
The thousand candidates who got through to the first round come from all over the world. Some 36 Britons have made the list, along with 297 Americans, 75 Canadians and 62 Indians.
Of the total, 813 are currently employed, 164 are in education and 81 are unemployed.
They must now undergo rigorous tests, including simulations of life on Mars and coping with isolation, co-founder Bas Lansdorp said.
NASA has launched a rocket set for Mars to study the red planet's atmosphere.
The Maven spacecraft is due to reach Mars next Autumn following a journey of more than 440 million miles.
Scientists want to unravel the mystery of the planet's drastic radical climate change, with Mars being warm and wet in its first billion years to cold and dry today.
The mission, which has cost $671 million (£417m), is NASA's 21st to the red planet since the 1960s but it is the first dedicated to studying the Martian upper atmosphere.
India's successful launch of an unmanned satellite to Mars will be a big boost for morale for the South Asian country, one of India's leading lunar scientists told the BBC.
As the mission blasted off from Chennai, in the east of the world's second most populous country, SK Shivakumar, director of the Indian Space Research Organisation (ISRO) in Bangalore said:
"National pride is important. If the Mars mission succeeds, it will be a big morale booster for India. We are not in a space race."
India has successfully launches its first rocket to Mars, aiming to put a satellite in orbit around the planet at a lower cost than previous missions, thus potentially positioning the nation as a budget player in the global space race.
The mission is considerably cheaper than previous missions by the United States, Europe and Russia. Costing 4.5 billion rupees - (or approximately just £45.7 million) it is a fraction of the cost of an average NASA satellite mission.
However the mission has attracted criticism due to the high levels of poverty, malnutrition and power shortages suffered by millions across the country.
The UK currently gives India £280 million a year in financial aid, but this will end in 2015.
India's space agency has launched it first mission to Mars from the Satish Dhawan Space Centre in Sirharikota, near Chennai.
India's space agency to is counting down to launch its first ever rocket to Mars this morning.
Indian Space Research Organisation (ISRO) scientists have said the mission is primarily aimed at testing the best technologies to fly and orbit and communicate from the Red Planet.
If the mission is successful, and the satellite orbits the Red Planet, India's space agency will become the fourth in the world, after the US, Russia and Europe, to undertake a successful Mars mission.
The 56-hour countdown to launch started on Sunday.
Today's mission follows India's successful 2008-2009 Chandrayaan-1 moon probe, which discovered water molecules in the lunar soil.