Content deleted Content added
No edit summary |
add a space |
||
Line 2:
'''John E. Bortle''' is an American [[amateur astronomy|amateur astronomer]]. He is best known for creating the [[Bortle scale]] to quantify the darkness of the [[night sky]].
Bortle has made a special study of [[comet]]s. He has recorded thousands of observations relating to more than 300 comets. From 1977 until 1994 he authored the monthly '"Comet Digest" in ''[[Sky and Telescope]]'' magazine. He also had a special interest in [[variable star]]s, recording more than 200,000 observations. From 1970 until 2000 he edited the monthly AAVSO circular for the [[American Association of Variable Star Observers]].<ref name="Peltier">{{cite web|url=http://www.astroleague.org/content/john-e-bortle-2013-leslie-peltier-award-0|title=John E. Bortle - 2013 Leslie Peltier Award|work=Astronomical League|accessdate=26 September 2014|url-status=dead|archive-url=https://web.archive.org/web/20150620002810/https://www.astroleague.org/content/john-e-bortle-2013-leslie-peltier-award-0|archive-date=20 June 2015}}</ref> He published his darkness scale in ''Sky and Telescope'' magazine in 2001.
==Recognition==
|