by Kat Troche of the Astronomical Society of the Pacific September 2025 marks ten years since the first direct detection of gravitational waves as predicted by Albert Einstein’s 1916 theory of General Relativity. These invisible ripples in space were first directly detected by the Laser Interferometer Gravitational-Wave Observatory (LIGO). Traveling at the speed of light […]
Category:
Night Sky Network
Posted on
October 1, 2025
Sign up for our newsletter:
Categories
3
2
2
18
1
2
1
253
52
31
1
3
6
13
340
15
117
1
10
1
1
1
4
10
4
215
12
2
1
11
1
29
1
26
15
165
1
188
1
1
9
1
4
2
15
1
6
93
2
8
3
50
3
3
2
14
1
1
1
41
205
1
10
131
6
18
29
17
1
2
4
149
3
377
3
1
25
31
1
1
2
1
25
64
37
18
1
18
81
29
41
10
20
15
4
43
6
2
1
349
42
1
2
14
102
1
6
153
100
1
1
16
38
4
101
1
1
3
10
2
57
1
3
3
189
133
1
10
9
1
1
11
5
6
10
3
1
11
35
22
2
5
9
1
5
40
2
2
1
330
2
4
1
336
12
20
1
25
1
106
1
3
1
2
14
1
10
11
4
1
7
51
613
24
287
140
13
6
1
23