Issue #4(30) 2021 Astronautics

An interplanetary transportation system

Circulating Transportation Orbits between Earth and Mars. Key: Earth (green), Mars (red), transfer orbit (black).
Circulating Transportation Orbits between Earth and Mars. Key: Earth (green), Mars (red), transfer orbit (black).
Paul W Phister MANIAC Consulting, New York, USA
Peter Swann ISEC, Phoenix AZ, US

To truly explore the stars, we must develop the capability to lift massive amounts of materials into space, which will require a far more efficient and capacious delivery solution than current launch vehicles, including the SpaceX Starship. Here, the authors describe their concept for a Galactic Harbour as part of a Dual Access to Space Architecture, a far-reaching idea that includes an inter-planetary transportation system or Space Train to ferry people, materials and supplies between the Earth and Mars.

SpaceX CEO, Elon Musk has publicised his intention to create an independent civilisation on Mars of 100,000 or even a million people by 2050… but a major issue for interplanetary travel is the repeated launching of significant amounts of mass from the Earth’s surface onto interplanetary trajectories.

Analysis has shown that it is stretching the imagination to think that one can use rockets with a payload capability of 20 megatons (MT) to move the materials required to support the vision of moving humanity off-planet.

Using current technology, it would take literally tens of thousands of launches and hundreds of years to achieve this goal. To lift enough mass to satisfy Elon Musk’s desired one million people and one million tonnes to the Martian surface, the StarShip would have to be launched roughly 40,000 times.

If you already have a login and password to access - Please log in to be able to read all the articles of the site.

Popular articles

See also


Portugal’s sustainable space strategy


Space nation set to mark its presence in orbit


Finding asteroids before they find us

Popular articles


The promise of space-based LiDAR

Artist's impression of space-based solar power providing energy to Earth via Space Solar's CASSIOPeiA satellite. Specials

Unlocking the NewSpace economy through space-based solar power