PREDICT
Predict
Start from geometry, astronomy, orbital mechanics, navigation, or timing formulas and generate a testable prediction.
Evidence engine online · 206 pages · 134 meme debunks
Test the globewith calculations, maps, and repeatable observations.
TestTheGlobe.com turns flat-earth claims and meme screenshots into direct checks: day and night, southern flights, curvature, Moon orientation, GNSS timing, satellite passes, telescope visibility, and numbered meme debunks. Every final page shows the formula, the graphic, and the measurable result.
Meme debunksGNSS timingProjection mapsShareable URLs
COMPARE
Compare
Put the globe model beside the flat-earth claim or meme screenshot and keep the coordinates, time, and observation fixed.
VERIFY
Verify
Use repeatable observations, sky checks, external references, and shareable URLs so the result can be checked independently.
Find your entry point
Jump straight to a claim, tool, or debunk: or browse the guided routes below.
Claim finder
I heard this on social media…
Type a flat-Earth claim or pick a shortcut. You get one debunk, one tool, and one experiment to test in a few minutes.
No match yet. Try a shortcut above or browse topics.
Guided learning paths
Three short routes from social-media claim to debunk, tool, and experiment: about 15 minutes each.
Guided path
No visible curvature
Start with the most common naked-eye challenge, then move into numbers you can check with a calculator or shoreline observation.
5 steps · ~27 min
Start pathGuided path
The Sun is small and local
Work through the local-Sun claim with timing, hemispheric checks, and a perspective tool for dramatic sunbeams.
5 steps · ~23 min
Start pathGuided path
Satellites are not real
Turn the satellites-are-fake claim into pass timing, visibility cones, and GNSS sky behavior you can inspect.
7 steps · ~36 min
Start pathMost-checked final releases
The pages visitors open most often when checking a specific flat-earth argument, including the meme gallery.
MEMES
FE Memes Gallery
Numbered screenshots with on-image claims, context notes, and links to the debunks each meme abuses.
Open pageCURVATURE
No Visible Curvature
Hidden height and horizon distance checks for the most shared horizon challenge.
Open pageSUN
Local Sun Debunk
Opposite hemispheres and solar timing versus a nearby spotlight.
Open pageSATELLITES
Satellites Are Not Real
Pass timing, dish pointing, and GNSS sky geometry in one place.
Open pageFLIGHTS
Southern Flight Paths
Great-circle versus flat-disc distances on real airport pairs.
Open pageSTARS
Circumpolar Star Check
Latitude-linked pole visibility and opposite trail directions.
Open pageFrom meme screenshot to measurement
Four recent meme screenshots with short debunk summaries. Each detail page links to tools and final debunks.
#00000184
Helicopter Hover and Foucault Pendulum Gotchas
A hovering helicopter shares the co-rotating air column near 1,038 mph equatorial surface speed, so it does not drift away at Earth's spin rate; Foucault pendulums precess at 15°/hour × sin(latitude) without hidden drives. A two-panel meme answered by shouting caricatures is inconsistent with museum pendulum periods reproduced worldwide. Use TestTheGlobe's Earth Rotation Speed to compare the meme's claim with a measurable prediction.
Read debunk
#00000187
Vanishing Point, Not Curvature
Perspective convergence lines drawn on a flat photo do not erase bottom-first hull hiding predicted by h ≈ d²/(2R) at surveyed eye height and distance. A Navy ship photo with yellow lines to a "Vanishing point" and #LinesOfConvergence is inconsistent with zoom restoring apparent size while occluded hull stays hidden. Use TestTheGlobe's Curvature Calculator to compare the meme's claim with a measurable prediction.
Read debunk
#00000205
The Chicken Coop Theory
The "CHICKEN COOP THEORY" dark infographic with a flat disk, ice rim, and firmament lid is conspiracy role-play art, not a logistics chart. Published polar and southern routes cross Antarctica on schedules, southern circumpolar stars rotate around a southern celestial pole, and GNSS geometry requires a spheroid.
Read debunk
#00000211
Flight Dynamics Assumes Flat Earth
The red oval on a textbook "Flight Dynamics Summary" page highlighting flat, non-rotating Earth assumptions treats a local tangent-plane approximation as a cosmology confession. Over short range, Earth's ~6,371 km radius makes surface curvature negligible: drop ≈ d²/(2R) is only ~8 m over 20 km, so local-level frames are standard engineering simplifications.
Read debunkEvidence engine
Final-release inventory and the method stack behind every page.
TOOLS.FINAL
27
Interactive Tools
Final-release calculators, simulations, and projection comparisons built to test specific claims with transparent math.
DEBUNKS.FINAL
36
Claim Debunks
Final-release, evidence-led responses tied to tools, formulas, external sources, and falsification criteria.
EXPERIMENTS.FINAL
9
Observation Guides
Final-release experiments visitors can run themselves instead of relying on second-hand claims.
MEMES.FINAL
134
FE Meme Debunks
Numbered flat-Earth meme screenshots, each with on-image claim notes and links to matching debunks and tools.
RELEASES.TOTAL
206
Library Total
Final tools, debunks, experiments, and meme pages ready to browse, search, and share.
Method stack
- 01Readable formulas with plain-text and visual math shown together
- 02Graphics and maps that isolate the model difference clearly
- 03Numbered flat-Earth meme pages that tie each screenshot to a specific debunk and tool
- 04Time-and-location-aware sky predictions for Sun, Moon, stars, GNSS, and satellite passes
- 05Evidence cards with claim, model, formula, assumptions, and falsification criteria
- 06Related debunks, tools, experiments, and memes linked by shared theories
- 07Primary-source-first external links and a public methodology page for follow-up reading
- 08Share-ready URLs so the same state can be checked by someone else
Start browsing
Pick a first check, then browse the full library. Beta pages stay available with ?beta=1.
MEMES
Best First Meme Check
Browse numbered flat-Earth meme screenshots and open the debunk that answers the specific trick in each image.
Open FE MemesSKY
Best First Sky Tool
Predict when the ISS or another visible satellite should rise, peak, and set for your location.
Open Satellite VisibilityGLOBE
Best First Globe Check
Use one instant in time and compare globe daylight against the flat-earth disc.
Open Day/NightLUNAR
Best First Moon Check
Compare how the same Moon phase rotates for different observers at the same UTC moment.
Open Moon ComparatorGNSS
Best First Navigation Check
See why GNSS fixes need timed ranges from multiple overhead satellites plus receiver clock-bias solving.
Open GNSS Geometry