NASA Photo ID: S71-58222          File Name: 10075762.jpg

Film Type: 4x5 b&w                Date Taken: 08/01/71

Title: Apollo 15 Lunar eclipse views

Description:

During the lunar eclipse that occured during the Apollo 15 lunar landing 
mission, Astronaut Alfred M. Worden, command module (CM) pilot, used a 35mm 
Nikon camera to obtain a series of photographs while the moon was entering 
and exiting the earth's umbra. This task was an attempt to measure by 
photographic photometry the amount of scattered light reaching the moon.
The  first view (l-r) is a four-second exposure which was taken at the
moment when  the moon had just entered the umbra; the second is a 15-second
exposure taken  two minutes after entry; the third, a 30-second exposure
three minutes after  entry; and the fourth is a 60-second exposure four
minutes after entry. The  background star field is clearly evident. The
spacecrafrt was in full  sunlight when these photographs were taken, and it
was pointed almost  directly away from the sun so that the windows and a
close-in portion of the  camera's line-of-sight were in shadow.