Last updated 2026-10-21
Legal
Terms of Use
Using this site means accepting these terms.
Use of this site
You may read, print and share anything here for your own use. You may not republish the content as your own.
Concept listings and plans
The listings, designs and master plan on this site are concept proposals. They are not offers, and they give no one any right to land, a building or a place on a mission.
No one can sell land on Mars. Nothing on this site is for sale.
Accuracy
Figures come from published sources such as NASA, JPL and the U.S. Geological Survey, and those sources revise their data. A figure can be out of date or wrong.
Tool results are estimates worked out from published values and the numbers you enter.
Not professional advice
Summaries of space law here are general information, not legal advice. Nothing here is engineering advice or a real estate service.
Limitation of liability
This site is provided as is. We are not liable for loss or damage resulting from anything you read here or from any product bought through it.
Changes
These terms may change. The date at the top of this page is the last revision.