For research
Data as of 2026-10-22
Galaxy draws real positions and says where each one comes from. This page gathers, in one place, what a reader needs to check that, cite it, or open the same view again.
Verify
- Methodology: how each position is computed, and the gap MEASURED between the position drawn and the one JPL Horizons serves, body by body.
- Sources and credits: the source and the read date of every displayed fact, the licence of every texture, and the third-party software.
Cite
The permanent identifier and a ready-made reference: Methodology, How to cite
Dated events
Each family below is generated at build time from published data, and every page names its source.
- Missions: what the Planetary Data System context registry declares about each mission and the bodies it studied.
- Flybys: the closest approach of a probe to a body, read on its trajectory.
- Orbit insertions: the first instant a probe becomes bound to a body.
- Perihelia: the closest pass of Parker Solar Probe and Solar Orbiter to the Sun, read on their trajectories.
- Contacts: a probe at rest on a small body, or crossing the 1 bar level of a giant planet.
- Great places: named surface features, with the orbiter instruments whose footprints cover them.
- Activities: printable classroom sheets whose every number is computed by the same code as the scene.
Reproduce a view
A view is an address. The body is in the path, and the query holds the date (UTC), the mode (educ or explo, the second keeping true scale) and, when shared from the Share button, the exact camera angles. For example, the Earth at that instant:
https://galaxy.adrianguichard.dev/earth/?date=2016-06-21T12:00:00Z
Read the code
The repository is public, and the technical contracts (how a position is chosen, how a dated product is classified) are written in its architecture document: