https://tuxar.uk/spectral-harmonographs/shg-2_0-2-00145227183_3-0042593415-2-49436558257_4-06601736327/ Scientific systems programmer (ex NASA, ESA/ESO, Hubble), web developer, online retailer (retired) Wed, 25 Feb 2015 20:04:28 +0000 hourly 1