Enigmatic depressions on the surface have puzzled scientists since the 1970s NASA’s MESSENGER spacecraft discovered strange hollows on the surface of Mercury. Images taken from orbit revealed thousands of mysterious depressions, pitted and uneven, in areas all across the planet, up to a half-mile (800 meters) across and 120 feet (37 meters) deep. This mosaic […]
Category:
The Solar System
Posted on
October 17, 2023
Sign up for our newsletter:
Categories
6
1
287
1
6
39
1
1
2
42
1
4
125
30
23
1
14
2
25
1
222
99
183
3
32
1
1
10
10
2
132
6
29
1
49
129
10
8
2
1
1
4
2
1
131
3
22
4
2
28
34
1
4
1
1
1
1
4
19
6
8
2
27
2
15
6
1
15
5
14
1
15
22
1
193
145
2
15
1
94
79
40
97
2
3
87
2
1
1
24
10
51
14
17
17
6
10
1
52
143
1
40
12
41
28
10
2
10
2
203
1
1
1
1
5
10
324
11
6
1
3
3
1
274
2
316
1
3
1
6
61
2
4
3
1
6
1
1
11
1
1
2
1
13
3
18
5
2
5
17
9
3
1
150
4
36
5
586
1
28
9
3
1
4
2
1
348
1
319
Blog Posts
A Winter Blanket Covers North Carolina
February 6, 2026
NASA Selects Two Earth System Explorers Missions
February 5, 2026
Career Spotlight: Welder (Ages 14-18)
February 5, 2026