CRÓNICAS ANACRÓNICAS · WITH CRONISTA
What is on the
other side?
Start with a place you know. Travel through an Earth you cannot see. Let a familiar idea become a question.
Choose your starting point ↓Explore at your own pace · No account needed
EXPERIENCE 01 / EARTH, INSIDE OUTHosted by CRONISTA
01 / CHOOSE A PLACE
Your opposite point
Pick a city, enter coordinates, or tap the coordinate map. A straight line through Earth’s center leads to your antipode.
Try a starting point
YOU START HERE
Bogotá
Calculated coordinates
Open starting point on OpenStreetMap ↗YOU COME OUT HERE
…
Calculated coordinates
Inspect arrival on OpenStreetMap ↗Tap the starting map to choose a point · Arrow keys move 5°; Shift + arrow moves 1°
Use latitude and longitude instead
Latitude −90 to 90; longitude −180 to 180.
About the geography
The educational map uses simplified geographic boundaries.
Opposite latitude. Longitude shifted by 180°. Coordinates describe the selected point.
Place searches stay in your browser. This page does not request your location.
Cities: GeoNames (CC BY 4.0), compacted catalogue · CC BY 4.0
Map: Natural Earth (public domain)
02 / ENTER THE THOUGHT EXPERIMENT
Down. Through. Up.
Imagine a straight, empty tunnel through the center. Move the traveler and compare the real layers with a deliberately simplified model of motion.
IDEAL MOTION · REAL LAYERS
The animation assumes a vacuum, no friction, no rotation and a spherical Earth of uniform density. Its clock is illustrative. The real layer diagram does not supply the model’s density.
Layer boundaries are approximate. The thin crust is enlarged for visibility.
At the surface: ready to fall
Depth below the nearest surface
0 kmDistance from the starting point
0 kmCrust
Surface to roughly 5–70 km
- Material
- Temperature
Gravity in the uniform-density model
The pull points toward the center.
Speed in the uniform-density model
03 / PREDICT, THEN RECONSIDER
What did you expect?
Choose before revealing the explanation. There is no score to chase; notice which picture of the world your answer relies on.
What is evidence, and what is a model?
Layer boundaries are rounded; Earth’s mean radius is about 6,371 km. The 35 km crust marker is illustrative: crust varies greatly in thickness. Temperatures are broad estimates, not a thermometer reading along your route.
USGS describes a center near 6,000°C; interior temperatures are inferred and estimates vary.
Reference sources are in English.
CRÓNICAS ANACRÓNICAS · WITH CRONISTA
A change of direction. A change of mind.
“Down” points toward a center. What do your everyday certainties point toward?
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