{"action":"created","issue":{"url":"https://api.github.com/repos/astropy/astropy/issues/4287","labels_url":"https://api.github.com/repos/astropy/astropy/issues/4287/labels{/name}","comments_url":"https://api.github.com/repos/astropy/astropy/issues/4287/comments","events_url":"https://api.github.com/repos/astropy/astropy/issues/4287/events","html_url":"https://github.com/astropy/astropy/issues/4287","id":114837921,"number":4287,"title":"Angstrom definition and numerical precision","user":{"login":"saimn","id":311639,"avatar_url":"https://avatars.githubusercontent.com/u/311639?v=3","gravatar_id":"","url":"https://api.github.com/users/saimn","html_url":"https://github.com/saimn","followers_url":"https://api.github.com/users/saimn/followers","following_url":"https://api.github.com/users/saimn/following{/other_user}","gists_url":"https://api.github.com/users/saimn/gists{/gist_id}","starred_url":"https://api.github.com/users/saimn/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/saimn/subscriptions","organizations_url":"https://api.github.com/users/saimn/orgs","repos_url":"https://api.github.com/users/saimn/repos","events_url":"https://api.github.com/users/saimn/events{/privacy}","received_events_url":"https://api.github.com/users/saimn/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-11-03T15:12:01Z","updated_at":"2015-11-03T18:09:15Z","closed_at":null,"body":"Is there a reason why `u.angstrom` is defined as `0.1 * u.nm` and not `1e-10 * u.m` ? \r\nWith the current definition I get this:\r\n```\r\nIn [2]: (1*u.angstrom).to(u.m).value\r\nOut[2]: 1.0000000000000002e-10\r\n\r\nIn [3]: (4.75e-7*u.m).to(u.angstrom).value\r\nOut[3]: 4749.999999999999\r\n```"},"comment":{"url":"https://api.github.com/repos/astropy/astropy/issues/comments/153440061","html_url":"https://github.com/astropy/astropy/issues/4287#issuecomment-153440061","issue_url":"https://api.github.com/repos/astropy/astropy/issues/4287","id":153440061,"user":{"login":"pllim","id":2090236,"avatar_url":"https://avatars.githubusercontent.com/u/2090236?v=3","gravatar_id":"","url":"https://api.github.com/users/pllim","html_url":"https://github.com/pllim","followers_url":"https://api.github.com/users/pllim/followers","following_url":"https://api.github.com/users/pllim/following{/other_user}","gists_url":"https://api.github.com/users/pllim/gists{/gist_id}","starred_url":"https://api.github.com/users/pllim/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/pllim/subscriptions","organizations_url":"https://api.github.com/users/pllim/orgs","repos_url":"https://api.github.com/users/pllim/repos","events_url":"https://api.github.com/users/pllim/events{/privacy}","received_events_url":"https://api.github.com/users/pllim/received_events","type":"User","site_admin":false},"created_at":"2015-11-03T18:09:15Z","updated_at":"2015-11-03T18:09:15Z","body":"@mhvk, can we say that our users are more interested in accuracy at, say, 4000 Angstrom, rather than at, say 1 Angstrom? Or is this not true?"}}