Atlas
Atlas is one of the seven tools of Aurora Commons. It serves Layer 2, learning.
First step: read the Proof below and check its seal yourself. The four lines you need are under Seal in the Proof.
The Proof
Claim
The Sun is 99.86 percent of all the mass in the solar system.
In plain words: The Sun holds 99.86 percent of the solar system's mass. Everything else, every planet, moon, and rock, is the remaining 0.14 percent.
In simpler words: Almost everything in the solar system is the Sun. If you could weigh it all, the Sun would be 99.86 parts out of 100. All the planets together are just a tiny piece.
Ground
This claim stands in the Atlas topic Solar System, in the file content/astronomy.js in this repository. That file records these sources for the topic:
The first source states the figure directly: "The Sun accounts for 99.86% of the Solar System's total mass."
Hand
The Atlas maintainers, who curate this atlas and stand behind what it says. The hand is on the record: the content file names the topic's curator (batch B02-hard-sciences, a working session of the maintainers) and the date the topic was verified.
Check
Method: the claim was read against the sources recorded for its topic.
Result: a match. The cited source gives the same figure, 99.86 percent.
Dates: the atlas records this topic as verified on April 22, 2026. This page was checked on October 15, 2026.
Links
Supports: the Solar System topic in the Atlas, the lesson this claim is drawn from.
Depends on: the sources listed under Ground.
Contradicts: nothing recorded. This is the first Proof the Atlas has published, so its web of links starts here.
Seal
SHA-256, first 16 characters: 6cc5595908ab0208
6cc5595908ab0208c908eac0c2b326003d116a8da1d7315af470cfe1dfbdb60e
The seal input, exactly as hashed
Claim: The Sun is 99.86 percent of all the mass in the solar system. Ground: https://en.wikipedia.org/wiki/Solar_System | https://science.nasa.gov/solar-system/ | https://apod.nasa.gov/apod/astropix.html Hand: The Atlas maintainers Check: Claim read against the recorded sources; the figure matches. Content verified 2026-04-22; this page checked 2026-10-15.
Atlas is for learning. Read short lessons on 100 subjects. Each fact shows where it came from and how it was checked.
Aurora Commons addresses the hierarchy of human needs through open source.
Motto: Stand on the shoulders of giants.
One Proof, four surfaces
The same Proof, shown four ways. On a phone, a watch, by voice, and on a big screen, the words may get shorter, but the claim and its check stay the same.
The Sun is 99.86 percent of all the mass in the solar system.
Ground: Wikipedia and NASA, recorded in the Atlas topic.
Check: match. Verified April 22, 2026.
Seal 6cc5595908ab0208
Sun: 99.86% of the solar system's mass
Checked
Seal 6cc55959
"Almost everything in the solar system is the Sun. If you could weigh it all, the Sun would be ninety nine point eight six parts out of one hundred. All the planets and moons together are just a tiny piece left over. This claim has been checked against its sources."
The Sun is 99.86% of the solar system's mass.
Checked against its sources.
Check it yourself
Open the source. The claim and its recorded sources sit in the Solar System topic file in this repository, and the source article is linked under Ground. The exact file name is in the section for agents and builders at the end of this page.
Check the seal yourself. Put the four lines printed under Seal into a SHA-256 tool. The first 16 characters of the result should match the seal on this page.
Read the check. The method, the result, and the dates are printed in the Check block. Nothing on this page asks to be trusted.
Check this claim yourself: the form takes about a minute, and someone will reply in public on that page.
This page shows one Proof. The full atlas has short lessons, pictures, and exercises you can try, on 100 subjects:
For agents and builders
The tutor that used to headline Atlas was dropped on October 15, 2026, by direction. Its eval harness stays in this repository as an archived experiment, in the folder tools/tutor-eval. The harness grades answers drawn from the atlas content for groundedness (whether the facts the atlas states appear in the answer) and citation presence, over 12 questions drawn from the atlas itself.
Committed baseline results, from the run recorded in the file tools/tutor-eval/results/baseline-report.md: groundedness 0.833, citation rate 1, correct source rate 0.75, across the 12 questions. The gates are groundedness 0.75, citation rate 1, and correct source rate 0.75. Run it with npm run eval:tutor. The build smoke test is npm test and the lint is npm run lint, as defined in package.json.
The Solar System topic file named in the Proof is content/astronomy.js in this repository. The full app sits behind the proof screen at atlas.html in this repository.
Below this layer: Still, the mind at peace
Above this layer: Cohort, belonging
Built on Still: the mind steadied.
Unlocks the ability to understand.
The research under this layer: Foundations, Learning and education