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
1
150
4
36
5
586
1
28
9
1
4
3
2
1
348
1
319
6
1
287
1
1
6
39
1
2
42
1
4
125
30
23
1
14
2
25
1
222
1
99
183
3
32
6
1
10
10
2
132
29
1
49
129
10
8
2
1
1
4
2
2
1
131
3
22
4
28
34
1
4
1
1
1
1
4
19
5
14
5
8
2
27
2
15
5
1
15
1
15
22
1
193
145
2
15
1
94
79
40
97
2
3
87
2
1
1
24
10
143
51
14
17
17
6
10
1
52
1
40
12
41
28
10
2
10
2
203
1
1
1
1
5
10
324
11
6
1
3
316
3
1
274
2
1
3
1
6
61
6
2
4
3
1
1
1
1
11
1
2
1
13
3
18
5
2
5
3
17
9
Blog Posts
NASA Selects Two Earth System Explorers Missions
February 5, 2026
Career Spotlight: Welder (Ages 14-18)
February 5, 2026
NASA’s SpaceX Crew-12 to Study Adaptation to Altered Gravity
February 5, 2026