Light seconds, light years, light centuries: How to measure extreme distances - Yuan-Sen Ting
Why the open web links it
Explains how astronomers measure vast cosmic distances using parallax and standard candles.
Linked by 9 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including ted.com, mec.pt, alldaynews.gr, 1200artists.com, poletoparis.com.