What we publish
We explain supergiant classification, size, luminosity, evolution, and well-known examples. Each page is written for a specific reader question and links to deeper guides only when they add useful context.
How sources are selected
Primary and educational sources from organizations such as NASA, the International Astronomical Union, STScI, ESO, and OpenStax are preferred. Sources are selected for the subject of each page rather than copied into a generic site-wide list.
How uncertain measurements are handled
Stellar radius, mass, distance, temperature, and luminosity can change as measurements and models improve. We use ranges where appropriate, distinguish apparent brightness from intrinsic luminosity, and avoid presenting uncertain rankings as permanent facts.
Review and corrections
Pages display their latest review date. When a cited source changes or a scientific claim needs correction, the page should be updated together with its review date and sitemap freshness signal.