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
17
2
1
39
2
297
43
45
1
1
7
3
1
1
29
10
198
106
104
33
10
6
1
16
135
1
6
1
203
3
1
3
10
45
1
10
354
1
1
68
2
52
2
1
2
11
2
1
3
1
2
1
30
5
4
1
138
19
21
1
93
13
109
2
14
111
13
10
1
4
18
163
2
1
14
21
3
3
57
1
181
3
2
396
6
1
33
7
64
34
13
27
1
38
6
1
374
4
25
18
17
2
57
34
3
110
3
1
4
4
1
13
1
48
15
5
1
271
12
227
1
5
35
6
1
362
2
12
5
126
1
1
6
10
1
8
18
12
1
155
2
1
10
10
2
20
10
10
3
1
2
149
10
3
41
1
2
17
1
8
15
14
1
1
30
2
380
26
216
45
2
18
1
4
642
47
1
1
10
2
7
6
1
17
38
14
5