Search found 2 matches

by pmersa
Mon Sep 30, 2013 9:02 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Mysterious Green Patches on the Sky (2013 Sep 30)
Replies: 275
Views: 509728

Re: APOD: Mysterious Green Patches on the Sky (2013 Sep 30)

Well, I think we would need to know more about the camera and photo set up. What is the type of camera and filters used? What is its sensitivity curve? And we certainly should know more details about the artifitial illumination used: direction, intensity, distance and, most important, the wavelength...
by pmersa
Mon Nov 21, 2011 9:13 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Around the World in 90 Minutes (2011 Nov 21)
Replies: 82
Views: 19603

Re: APOD: Around the World in 90 Minutes (2011 Nov 21)

at 2:00 (just beginning the mediterranean excursion from the west): left, Sahara desert, centre, the Magreb (north Africa), in the distance, at right, the Gibraltar strait and next to it the Iberian peninsula, Portugal on the Atlantic coast (top) and Spain the rest (also touching the mediterranean a...