· Nicole Willett

Humans to Mars

humans to Mars Mars mission Mars Direct space exploration NASA

By: Nicole Willett

The dream of sending humans to Mars has driven space exploration for decades. What was once the realm of science fiction is now a serious engineering and scientific endeavor, with multiple organizations developing plans to make the first human Mars mission a reality.

The Case for Going

Why should humanity invest the enormous resources required to send people to Mars? The reasons are both scientific and civilizational:

Scientific discovery: A human geologist on Mars could accomplish in a single day what a rover takes months to achieve. The search for evidence of life on Mars, past or present, would be dramatically accelerated by the presence of trained scientists on the surface.

Technological advancement: The challenges of getting to Mars and living there will drive breakthroughs in propulsion, life support, energy production, materials science, and many other fields, with benefits that flow back to improve life on Earth.

Ensuring human survival: Becoming a multiplanetary species reduces the existential risk to humanity. A settlement on Mars would ensure that human civilization could survive even a catastrophic event on Earth.

Inspiration: A human Mars mission would be the greatest exploration achievement in history, inspiring generations of scientists, engineers, and dreamers around the world.

The Mars Direct Plan

One of the most influential plans for human Mars exploration is Mars Direct, developed by Dr. Robert Zubrin and David Baker in the 1990s. Mars Direct proposed a streamlined, cost-effective approach:

  1. First launch: An unmanned Earth Return Vehicle (ERV) is sent to Mars, where it uses the Martian atmosphere to produce rocket fuel for the return trip through a process called In-Situ Resource Utilization (ISRU).
  2. Second launch: A crew habitat is sent to Mars with four astronauts. The crew spends approximately 18 months on the Martian surface conducting exploration and research.
  3. Return: The crew returns to Earth using the ERV and the fuel produced on Mars.

This approach dramatically reduces the mass that needs to be launched from Earth, making the mission more affordable and technically feasible.

Current Plans

Several organizations are now working toward human Mars missions:

NASA: NASA’s Artemis program aims to return humans to the Moon as a stepping stone to Mars. The agency has outlined plans for human Mars missions in the 2030s and beyond, using the Space Launch System (SLS) and Orion spacecraft as core elements.

SpaceX: SpaceX is developing the Starship vehicle specifically for Mars missions. Elon Musk has outlined an ambitious vision of establishing a self-sustaining city on Mars, beginning with initial cargo missions followed by crewed flights.

International partners: The European Space Agency, China, and other space agencies have expressed interest in participating in human Mars exploration, either independently or as part of international partnerships.

Key Challenges

Sending humans to Mars requires solving several major technical challenges:

  • Life support: Keeping a crew alive and healthy during a 6-9 month journey and an extended surface stay requires reliable, closed-loop life support systems.
  • Radiation protection: Astronauts must be shielded from galactic cosmic rays and solar particle events during transit and on the Martian surface.
  • Landing large payloads: Landing human-scale payloads on Mars requires new entry, descent, and landing technologies far beyond what has been used for robotic missions.
  • In-situ resource utilization: Producing fuel, oxygen, and water from Martian resources is essential for reducing the mass that must be launched from Earth.
  • Communication delays: The 4-24 minute one-way communication delay between Earth and Mars means that crews must be capable of operating autonomously.

When Will It Happen?

While specific timelines remain uncertain, the consensus among space agencies and private companies is that the first human mission to Mars could occur within the next two decades. The technical challenges are significant but solvable, and the will to go is growing stronger every year.

When humans finally set foot on Mars, it will be the culmination of a dream that has inspired humanity for generations. It will also be the beginning of a new chapter in human history — one in which our species is no longer confined to a single world.