Some extraordinary asteroids have “activity”—comet-like tails or envelopes of gas and dust. NASA’s Active Asteroids project announced the discovery of activity on fifteen asteroids, challenging conventional wisdom about the solar system. To find these fifteen rare objects, more than 8000 volunteers combed through 430,000 images from the Dark Energy Camera (DECam) on the Victor M. […]
Posted on
March 15, 2024
Sign up for our newsletter:
Categories
2
149
1
2
3
2
2
1
3
32
3
4
28
11
4
1
3
2
108
14
29
14
43
1
5
1
1
12
10
42
14
6
1
13
1
1
6
11
3
10
2
40
10
54
1
6
32
1
11
1
263
33
121
1
1
1
3
171
356
2
2
10
1
221
65
2
8
134
10
1
10
1
10
4
1
32
346
1
1
626
20
291
108
11
3
1
1
1
157
1
212
4
20
17
3
29
1
1
1
1
1
1
59
26
25
1
18
1
52
10
41
196
2
23
6
2
370
5
4
15
1
51
44
3
24
18
10
1
3
10
1
1
346
1
17
1
103
102
4
134
10
12
18
1
89
39
37
6
15
149
384
6
1
4
2
4
18
2
198
1
6
37
1
8
17
25
6
1
3
11
2
17
2
1
6
10
1
103
43
5
10
14
13
1
2
Blog Posts
NASA Astronaut Chris Williams Preps for Spacewalk
June 29, 2026
Mapping Earth’s Observations, featuring Betsy Ford
June 29, 2026