Parallax Beyond a Kiloparsec from Spatially Scanning the Wide Field Camera 3 on the Hubble Space Telescope · HackerPapers discussionshttps://hackerpaper.kaipfister.de/p/1401.0484/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMTParallax Beyond a Kiloparsec from Spatially Scanning the Wide Field Camera 3 on the Hubble Space Telescope — mentioned by teraflophttps://news.ycombinator.com/item?id=17805163urn:hackerpapers:mention:1401.0484:17805163Mon, 20 Aug 2018 23:33:13 GMT<p>&quot;Accurate to within 100 light years&quot; isn&#x27;t really a meaningful statement. The page you linked to is a simplified explanation that says the method is only accurate enough to be used for stars within 100 light-years of Earth, which is approximately true. We have measurements of more distant stars, but they become increasingly inaccurate with distance. To be more precise, the relative error of a parallax distance measurement is proportional to both the measurement error and the distance. For example, the Hipparcos mission measured parallax with an accuract of roughly 0.001 arc-seconds. That…</p><p><a href="https://hackerpaper.kaipfister.de/p/1401.0484/">Paper and discussion history</a>. A mention is not an endorsement.</p>astro-ph.IM