This full-disk image from NOAA’s GOES-13 satellite was captured at 7:45 a.m. EDT (11:45 UTC) and shows the Americas on June 21, 2012, the start of astronomical summer – in the Northern Hemisphere – that year. The first day of summer in 2025 is June 20; it is also the longest day of the year. […]
Posted on
June 20, 2025
Sign up for our newsletter:
Categories
1
12
4
4
13
10
1
2
1
37
16
1
1
25
199
3
1
2
158
1
1
1
2
1
24
19
18
1
18
79
25
135
2
40
1
2
10
1
9
1
6
15
4
9
14
1
4
13
6
2
1
1
299
3
15
6
3
42
1
10
100
1
29
1
11
8
12
2
3
3
16
12
1
324
14
1
35
1
18
1
6
6
1
5
48
144
10
41
5
1
4
9
2
23
1
3
10
2
31
5
6
1
2
62
1
37
1
16
3
3
281
7
2
150
1
2
2
1
7
596
24
2
9
97
4
6
103
30
1
55
4
1
14
1
90
31
1
8
1
1
235
1
1
13
10
106
3
2
3
51
28
1
29
2
1
10
146
185
1
1
3
335
2
1
324
360
132
10
1
42
128
210
18
2
50
13
Blog Posts
NASA’s IXPE Gets Fresh Look at Supernova
March 26, 2026