Original sentence: On August 13, the observed ZHRmax was 116 (at 20:10 UT).Reported to be the most active shower in recorded history, especially when viewed from over 12,000ft in Colorado on August 12, 1972.The 2009 shower is expected to peak on the night of Tuesday-Wednesday August 11 - August 12.The Perseids were active from July 17 to August 24, 2008.The shower peaked on the new-Moon night of Sunday–Monday, August 12–August 13 and had an observed ZHRmax = 93
Edited sentence: 12 August: reported to be the most active shower in recorded history, especially when viewed from over 12,000 ft in Colorado.13 August (ZHRmax 116) http://www.13 August (ZHRmax 93) http://www.14 July - ... http://www.19 July - 25 August http://www.25 July - 24 August http://www.Expected: 11 August - 12 August http://science.Peak of shower.Perseids active between.gov/headlines/y2009/31jul_perseids2009.htm NASA The 2009 Perseid Meteor Shower.net/live/perseids2007/.net/live/perseids2008/.net/live/perseids2009/