On April 21, 1972, NASA astronaut John W. Young, commander of the Apollo 16 mission, took a far-ultraviolet photo of Earth with an ultraviolet camera. Young’s original black-and-white picture was printed on Agfacontour professional film three times, with each exposure recording only one light level. The three light levels were then colored blue (dimmest), green […]
Posted on
January 13, 2025
Sign up for our newsletter:
Categories
1
16
4
1
38
7
10
2
3
176
141
1
280
4
12
3
1
1
1
11
6
1
5
110
16
6
2
544
1
3
4
10
1
1
1
8
1
3
16
10
19
17
2
76
1
1
28
2
3
4
36
13
4
93
11
1
3
4
5
21
1
196
12
1
12
1
43
64
2
159
237
2
6
37
2
13
296
10
28
6
1
243
38
129
13
23
23
1
1
1
2
1
134
6
3
3
16
55
1
11
107
130
1
85
1
1
1
5
2
155
1
3
10
27
4
39
45
30
85
1
1
1
13
5
1
4
3
2
12
3
1
8
3
22
87
23
3
1
1
2
33
2
1
1
8
13
2
46
298
275
2
26
1
1
4
1
Blog Posts
Waning Crescent Moon
June 25, 2025