APOLLO: the Apache Point Observatory Lunar Laser-ranging Operation: Instrument Description and First Detections · HackerPapers discussionshttps://hackerpaper.kaipfister.de/p/0710.0890/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMTAPOLLO: the Apache Point Observatory Lunar Laser-ranging Operation: Instrument Description and First Detections — mentioned by harshpotatoeshttps://news.ycombinator.com/item?id=2137979urn:hackerpapers:mention:0710.0890:2137979Tue, 25 Jan 2011 04:25:30 GMT<p>This is relevant. http://arxiv.org/pdf/0710.0890v2 The gist of the story is: Use a large telescope to not only increase your collecting area, but focus your beam onto that surface: turn that measly 1 milliradian divergence laser into a 1 microradian divergence laser.</p><p><a href="https://hackerpaper.kaipfister.de/p/0710.0890/">Paper and discussion history</a>. A mention is not an endorsement.</p>astro-ph