Apollo astronauts set up mirror arrays, or “retroreflectors,” on the Moon to accurately reflect laser light beamed at them from Earth with minimal scattering or diffusion. Retroreflectors are mirrors that reflect the incoming light back in the same incoming direction. Calculating the time required for the beams to bounce back allowed scientists to precisely measure […]
Posted on
January 2, 2025
Sign up for our newsletter:
Categories
11
34
235
4
5
2
281
4
134
28
13
1
10
18
373
3
41
1
37
6
663
13
1
14
1
8
24
55
15
3
29
1
1
19
10
1
19
9
6
3
3
1
152
1
2
1
18
387
26
300
211
19
3
1
48
222
2
13
3
4
7
1
6
46
17
95
55
6
10
1
41
3
17
46
30
20
46
2
4
141
3
1
1
202
107
1
1
7
11
10
1
4
109
159
3
3
19
1
6
2
2
46
3
1
2
14
1
7
3
1
1
1
2
11
3
2
1
1
2
10
364
21
1
1
30
5
136
59
410
11
13
1
114
10
1
2
1
1
14
1
14
29
4
1
13
38
2
1
102
1
46
14
3
1
172
6
188
2
1
112
2
1
3
21
6
1
62
18
2
12
1
6
67
37
17
1
390
33
11
5
59
12
35
3
70
1
1
11
1
8
113
Blog Posts
Rains Swamp the Gandak River
October 2, 2026
10 Things: Movie Night
October 2, 2026