NASA astronaut Don Pettit demonstrates electrostatic forces using charged water droplets and a knitting needle made of Teflon. This series of overlapping frames from Feb. 19, 2025, displays the unique attraction-repulsion properties of Teflon and charged droplets, similar to how charged particles from the Sun behave when they come in contact with Earth’s magnetic field. […]
Posted on
December 19, 2025
Sign up for our newsletter:
Categories
384
5
1
4
5
15
148
18
2
198
2
4
1
8
16
25
1
6
37
3
11
2
17
2
1
6
6
1
43
5
10
1
103
13
1
2
10
14
2
3
2
149
1
3
4
28
11
2
2
1
3
32
3
2
107
4
1
14
14
29
1
1
12
43
1
5
6
1
13
1
1
10
42
14
2
40
6
11
3
10
11
1
262
33
10
54
1
6
32
1
1
3
171
354
2
121
1
1
2
10
134
1
221
65
2
7
10
1
10
1
4
1
32
10
624
20
345
1
1
1
1
291
106
11
3
157
1
1
29
1
1
1
212
4
20
17
3
1
1
1
59
25
25
18
1
52
10
1
2
23
41
196
368
5
4
6
2
1
51
44
3
15
1
3
24
18
344
1
17
1
103
10
1
1
1
89
39
37
101
4
134
10
12
18
Blog Posts
Millions of Stars in Cigar Galaxy
June 25, 2026
A Turquoise Tint for the Black Sea
June 25, 2026