When Should We Send Humans to Mars?
The rockets are almost ready, but are we?
Gearing Up for Mars
For the first time in history, human space exploration will go beyond our Moon. With more than one organization looking to send humans to the Red Planet, traveling to Mars isn’t just a distant possibility — it’s an impending reality.
In 2020, there will be a specific launch window that will allow travel from Earth to Mars in the shortest, most efficient path possible. Given our current rocket technology, the trip would take about five to six months. This window will not only expedite travel, but will give organizations a more specific time frame to work within. However, according to current progress, it is most likely that government and private space organizations will be sending only unmanned probes until the 2020’s and 2030’s.
NASA notes that “they are currently further along than ever before in human history on [their] Journey to Mars.” Additionally, last year, SpaceX started testing the rocket intended to bring humans to the red planet, China announced its ambitious plans to reach Mars (with an unmanned probe) by the end of the decade, and the UAE announced that they plan to have a human colony there by 2117.
Today we have unprecedented support for Mars exploration from Congress, industry, and the general public. Children born in 2017 are more likely than any generation before them to witness, before their 18th birthday, humans walk on another planet for the first time.
The Reality of Martian Travel
This unprecedented support is encouraging, but it will take a lot more than that to send humans to Mars.
For starters, there will be no stopovers between Earth and Mars — which means that everything humans will need, including (but not limited to) food, water, air, will need to be on board for a round-trip that experts are estimating to last two-three years. Six months to get there, six months back, and at least a year in between as they conduct research and wait for a launch window.
Of course, given advances in technology and the continued success of the International Space Station (ISS), we are significantly more knowledgeable than ever about space travel and how to ensure an efficient use of resources. Still, even the ISS requires supplies to be sent to the outpost every few months.
ISS astronauts consume nearly two pounds of food daily. If you assume the same volume of food will be consumed by a four-person crew on a three-year Mars mission, that means they need to bring a total of 24,000 pounds of food with them. SpaceX may have been able to deliver a payload of 5,500 pounds of supplies to the ISS, but that was because they used an unmanned Dragon capsule.
NASA tried to find a food solution with a recent 3D printing project that yielded a 3D printed pizza. However, it might be more possible to make up this shortage by space farming, but the field is still in its infancy. To date, the ISS’ Vegetable Production System has only been successful in planting flowers and five harvests of Chinese cabbage. Eventually, though, once the technology is better understood and more trials prove to be successful, space farming could hit two birds with one stone and provide food as well as oxygen.
These challenges are currently being addressed by the different space agencies preparing for their Mars missions. And, hopefully, by the time the launch window opens up, we’ll be more than ready to explore the Red Planet.