Building a Shared Language
Measuring mass in zero-g, exponential vocabulary, and loneliness
Grace and Rocky build shared vocabulary at exponential speed. Grace invents a method to measure mass without gravity, and Rocky reveals a devastating truth: his entire crew died from interstellar radiation.
How to measure mass in zero gravity
Grace ties a string with two containers at the ends and balances water against an iron ball until they spin at the midpoint.
The science behind it
Weight depends on gravity: you weigh less on the Moon, more on Jupiter, nothing in space. But mass is intrinsic: it doesn't change regardless of where you are.
Grace's trick: two objects on the ends of a spinning rope. If both have the same mass, the center of rotation stays in the middle. If one is heavier, the center shifts toward it.
Using water as reference (density = 1 kg/L), Grace measured the water's volume with a syringe (in cubic centimeters = milliliters) and directly got mass in grams. Result: 325 g.
Rocky already knew the answer: the ball was iron (element 26). With the measured diameter and iron's density (7.87 g/cm³), the theoretical mass is 328.25 g. Grace was only off by 1%.
Key terms
Try it yourself
Zero-G Mass Balance
In zero gravity you can't weigh things. But you can compare masses by spinning two objects on a rope.
Grace balanced 325 mL of water against Rocky's iron ball (328 g theoretical). Error: ~1%
Language grows exponentially
Grace and Rocky go from numbers to "yes/no" to abstract concepts. The dictionary grows faster with each new word.
The science behind it
Zipf's law applied: the first words in any language are the most used (numbers, "yes," "no," basic verbs). With each new word, you can define more words using the ones you already have.
It's like compound interest: progress starts slow (10 words → 20 in a day). Then accelerates exponentially (100 → 300 in a day) because you combine existing ones.
Rocky has perfect auditory memory: remembers every chord without notes. In humans, a large brain area is dedicated to vision. In Eridians, that area likely serves sound.
Mathematical base is universal: you don't need a natural language for two intelligent species to start communicating. Numbers + pointing at objects + yes/no is enough to begin.
Key terms
Rocky's loneliness: 23 crew members killed by radiation
Rocky reveals he was the sole survivor. His crew of 23 died from cosmic radiation. Rocky survived because he was surrounded by astrophages.
The science behind it
Erid has a magnetic field 25× stronger than Earth's and 29 atmospheres of protection. Eridians NEVER evolved radiation resistance because their planet protected them 100%.
Leaving Erid's magnetosphere, the crew received lethal doses of galactic cosmic rays (GCRs): protons traveling near light speed, created by supernovae.
Rocky survived because he was in the workshop, surrounded by astrophage containers. Astrophages block all radiation (supertransversality): not even neutrinos pass through them.
When Rocky speaks softly (an octave lower), he expresses sadness. Humans also lower pitch and volume when sad. Emotional expression through sound is a biological universal.