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.
More signs of past water on Mars have been uncovered by NASA's Curiosity rover.
Powder drilled from a Martian rock last week revealed evidence of drinkable water and conditions that would once have been favourable to life on the Red Planet.
Now instruments on the rover have found more water-bearing minerals in the wider area around the rock.
The new discoveries were made using the infrared imaging capability of Curiosity's mast camera, and an instrument that shoots neutron particles into the ground to probe for hydrogen.
It is further evidence that the Yellowknife Bay area of Gale Crater that the rover is now exploring was once a river system or lake that could have supported life.
After seven months of searching, NASA's Mars rover has uncovered what scientists say is clear evidence of an environment that could have supported life.
ITV News Science Editor Lawence McGinty reports:
Scientists working on the Mars rover mission believe they have found evidence of conditions that could have supported life on the Red Planet.
The believe the Yellowknife Bay area, which the rover is currently exploring, was once a river system or lake bed that could have supported living microbes.
Analysis of rock samples indicate that the formerly wet environment was not overly acidic, salty or "oxidising" - conditions necessary for supporting life.
It is backed up by evidence gathered from the rover's first drilling sample which identified sulphur, nitrogen, hydrogen, oxygen, phosphorus and carbon - some of the key chemical ingredients for life.
Michael Meyer, lead scientist for NASA's Mars Exploration Program, said: "A fundamental question for this mission is whether Mars could have supported a habitable environment.
"From what we know now, the answer is yes," he added.
Millionaire space tourist Dennis Tito has unveiled ambitious plans to send a man and a woman near planet Mars in January 2018.
He is looking for a mature married to make the the 501-day flight that will go within 100 miles of the martian surface before swinging back to Earth.
He told ITV News that it would be hard, but was 'do-able' with the right couple.
Anu Ojha, Director National Space Academy Programme has said that although he is excited by the Mars mission he has more questions than answers after the announcement earlier.
He told ITV News, "This is an incredibly audacious plan - but we've had audacious plans in the past for human exploration towards Mars."
The Inspiration Mars team have said that the ideal crew for the mission will be, "two professional crew members - one man, one woman - flying as private US citizens."
Jane Poynter added that the crew members they sought should be a 'proven couple,' to help cope with the long trip.
The website for the mission added that, "method of crew selection and specific criteria to be announced at a later date."
Jane Poynter has spoken about how the astronauts in the mars mission will help inspire future generations and how they will remain in contact with Earth.
Ms Poynter told a press conference to launch the mission, "imagine a 13-year-old girl and her classmates getting a tweet from the female astronaut at Mars, looking down on that planet for the first time and describing what she's seeing."
Jane Poynter is the president and chairwoman of Paragon Space Development Corporation, who are leading the development of the Environmental Control and Life Support System for Inspiration Mars.
Speaking at the Inspiration Mars Foundation launch Taber MacCallum highlighted both the charitable fund raising and the hope for education when citing a recent $10 donation from a 6-year-old boy who said, "I want to be one of the first to send a donation - because this is my Apollo."
Several of those speaking at the launch have referenced the Apollo missions as inspiration.
The Inspiration Mars will be funded largely through private, charitable donations, but at the launch Dennis Tito said the cost would be 'lower than expected.'
Dennis Tito said; "We can't come up with a number but we know that the cost will be much much lower than you would expect from a Mars mission. It'll be more like a mission to low Earth orbit. Now that's inexpensive but it's at least in a dollar range that we can comfortably raise the money."