The Night You Were Born
CalculationTime
The Night You Were Born
Enter a birth date, local time and birthplace coordinates to reconstruct the sky at that moment, compare it with the same sky now, and watch the elapsed-time record keep ticking.
Inputs, result, proof and time.
Use the instrument above, then check the calculation record, assumptions and related tools below.
Birth-sky observatory
The Night You Were Born
Enter a birth date, local time and birthplace coordinates to reconstruct the sky at that moment, compare it with the same sky now, and watch the elapsed-time record keep ticking.
Workshop productBirth sky plus elapsed cosmosRestored from the Claude/Jack 2026-08-02 candidate preserved in the local inbox; staged without touching the canonical site while Jack continues his parallel side.
Atomic summary
A staged observatory turns one birth moment into sky, time, distance and printable proof.
The instrument combines a bright-star catalog, Don Cross Astronomy Engine calculations for the Sun, Moon, planets and eclipse/event searches, a live elapsed-time panel, split birth-now sky comparison, privacy-aware sharing controls and nine Print Room poster designs. It is staged noindex while the astronomy claims, share layer and mobile behavior are reviewed before any permanent route is approved.
Method and approval route
This staged build is being prepared for calculator approval.
Intended permanent route after approval: /astronomy/night-you-were-born/. This staged page stays noindex until the name, source notes, mobile layout and calculator behavior pass review.
Planet and Moon model
The embedded Don Cross Astronomy Engine is used for Sun, Moon, planet, illumination and event calculations. With correct birth time, UTC offset and coordinates, those topocentric altitude/azimuth outputs are treated as arcminute-class calculations; real atmospheric refraction and bad input data can dominate the error budget near the horizon.
Star display boundary
The visible star field uses a 325-star bright-star catalog. Catalog coordinates are now precessed and nutated to the observation date before horizon projection, so the claim is a genuine naked-eye sky-chart accuracy claim. It remains a visual chart, not a professional astrometric certificate, because proper motion, parallax, radial velocity and local refraction are not fully modelled for every star.
Elapsed-time stack
The live panel converts the birth instant into days, decimal solar years, galactic travel using 828,000 km/h, light-shell distance, approximate heartbeats, estimated human births and local solar-eclipse search results.
Approval lane
This page is noindex and parked at /1. Promotion to a permanent public URL still needs Billy approval after Peter and Jack compare source, verification proof and production behavior.
Don Cross Astronomy Engine
Yale Bright Star Catalog
International Astronomical Union
Interactive workshop instrument