TANGENT PRESS
Where straight lines meet curved thinking
Copernicus on Trial
The experiments he could not perform
What if you could test Earth's shape yourself—without trusting NASA, scientists, or anyone else?
This book doesn't ask you to believe. It asks you to measure.
Copernicus on Trial presents a collection of experiments that anyone can perform to investigate claims about Earth's geometry. No advanced degrees required. No expensive equipment. No faith in authority.
Each experiment includes:
- Clear predictions from both globe and flat-Earth models
- Equipment lists with specific product recommendations
- Step-by-step procedures you can follow
- Expected results and how to interpret them
From laser tests over water to stellar observation at different latitudes, from gyroscope measurements to longitude experiments—this book provides the tools to stop arguing and start measuring.
"The Earth is either curved or it is not. These are not matters of opinion. They are matters of measurement. Go measure."
Paperback: 103 pages | 6" × 9" | January 2026
ISBN: 979-8-345-51174-5
Community
Have you performed any of the experiments from our books? We want to hear about it. Share your equipment setups, methodology, raw data, and results with fellow readers. Whether your findings support or challenge conventional models, real data advances the conversation.
Join the Discussion on RedditTangent Press publishes works that examine questions others prefer to leave unasked. We believe in measurement over authority, geometry over consensus, and the courage to follow evidence wherever it leads—even if only at a single point of contact with the mainstream.