Answer pages

Why these exist

The application computes everything in your browser, which makes it free to run and impossible to read without running it. Measured against the built product: fetching /sim.html returns a loading placeholder and no facts at all, and a browser driving the full scene first resolves a catalogued spacecraft after about 16 seconds served over loopback — a floor no real network reaches — and about 147 seconds on an ordinary 4 Mbit link, having transferred roughly 70 MB. These pages are the registry's answer to anything that cannot wait that long, which is most software and many people.

What this registry can be asked

Each example below is a working address.

• What does the registry hold about one object, and how sure is it?
  a static page per notable object: every value beside its source and its 1σ
  /answers/MARS.html
• Where is an object on a given date, past or future?
  the scene composes it from the sourced elements — set the clock in the URL
  /sim.html#sel=MARS&t=2461245.34655
• What has humanity left on the surface of another body?
  one page per catalogued artefact left on the Moon and Mars
  /answers/index.surface-artifact.html
• Which spacecraft reached which body, under which planetary-protection category?
  the mission pages carry the COSPAR classification as a documentation fact
  /answers/index.mission.html
• What is on the impact-risk list, and what is a given orbit worth?
  the hazard pages carry the Sentry listing and the MPC uncertainty parameter
  /answers/index.hazard.html
• Which catalogues disagree about a value, and what did each say?
  disagreements are kept, not resolved away, and printed above the facts
  /answers/index.body.html
• What did humanity deliberately transmit, when, and toward what?
  the transmission and artefact record of "A Profile of Humanity"
  /answers/index.message.html
• Which named star, comet or galaxy, and at what measured distance?
  one page per object carrying a deliberate name, never a bare designation
  /answers/index.named-star.html

Classes of page

• body — 539 pages: a natural body or frame anchor: its measured size, mass, spin, orbit and the catalogue that measured each.
• event — 76 pages: a dated, located event — a detonation, an impact, a supernova, a gravitational-wave merger, a directed transmission.
• station — 46 pages: a crewed or flagship structure and the measured fixes behind it.
• message — 200 pages: a deliberate human transmission or artefact catalogued in "A Profile of Humanity" — what was sent, when, and toward what.
• surface-artifact — 694 pages: a named object humanity left on the surface of another body — the registry's headline question, answered per artefact.
• named-star — 306 pages: a star carrying an IAU proper name: its distance, temperature and measured motion, with the uncertainty its catalogue publishes.
• named-galaxy — 59 pages: a named galaxy of the Local Volume and its measured distance.
• comet — 1,414 pages: a periodic comet named for its discoverer: its orbit, period and the fit behind them.
• hazard — 68 pages: a near-Earth asteroid that is individually named or currently on the NASA/JPL Sentry impact-risk list — the orbit, what the fit is worth (the MPC uncertainty parameter), and its recorded close approach.
• mission — 1,197 pages: a spacecraft that reached another body or carries a published 3-D model — where it went, under which planetary-protection category, and whether it was registered with the United Nations.
• exoplanet — 162 pages: an exoplanet or host star carrying an IAU-approved proper name.

Quoting from these pages

Please carry the source and the uncertainty with the value. Every page names the database each figure came from; that database, not this registry, measured it. Attribution asked: SolarSystemRegistry.org — Adrien Normier, plus the named source.

In development — a prototype, offered humbly and open to revision. Bake 2026-09-02T19:55:06.294Z · llms.txt · sources · literature