YENRA — WEBB IMAGE-READING NOTES
Guide: https://yenra.com/wiki/James_Webb_Space_Telescope/
Version: September 10, 2026

Open in a text editor and save one copy per image or spectrum.
Copy labels from the official release; retain uncertainty and unknowns.
Separate direct visual descriptions from the scientific interpretation.

OFFICIAL SOURCE
Object name/designation:
Official image/release URL:
Observation date(s):
Release date:
Credits:
Instrument / observing mode:
Filters and assigned visible colors:
Field size and units:
Scale bar length and units:
Compass orientation:
Crop, rotation or resizing of the copy being examined:

READ THE IMAGE
One directly visible feature:
One inference supported by the official caption or paper:
Evidence for that inference:
One unresolved question or alternative explanation:
Supporting research URL:

OPTIONAL SCALE ESTIMATE
Feature length on this copy (pixels or mm):
Scale bar length on this SAME copy (same units):
Ratio = feature length / scale bar length:
Projected feature size = ratio x source scale-bar value:
Source distance assumption and measurement uncertainty:
Do not equate projected size with a full three-dimensional extent.

OPTIONAL SPECTRUM
Horizontal axis label and units:
Vertical axis label and units:
Data points, uncertainty bars and fitted-model legend:
Feature supporting the claim:
Alternative feature identifications considered:
Calibration or contamination limits:

WORKED REFERENCE
https://science.nasa.gov/asset/webb/tarantula-nebula-nircam-compass-image/
Tarantula Nebula: NIRCam, observed June 2, 2022;
released September 6, 2022. Scale bar: 50 light-years.
F090W = blue; F200W = green; F335M = orange; F444W = red.
An illustrative feature twice that bar has projected size about
100 light-years, subject to the distance and measurement assumptions.