This plaque, carried by Pioneer 10 and Pioneer 11 space probes, describes the location of the Sun. What are the points at the ends of the lines?

planets of the Solar System
galaxies
quasars
pulsars
Each of the line includes binary encoding of pulsar frequency, so these can be easily recognized. The hydrogen spin-flip transition frequency is used as the unit of time (Hydrogen particle at the top of the image).
Sophie Letherman
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Very interesting!
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Answers by country

planets of the Solar System
galaxies
quasars
pulsars
answers
flagCanada
40%
6%
12%
40%
32
flagthe United Arab Emirates
45%
9%
9%
36%
11
flagGreece
23%
17%
23%
35%
17
flagPoland
32%
16%
15%
33%
8861
flagthe United Kingdom
35%
11%
16%
33%
137
flagBelarus
25%
20%
25%
30%
20
flagthe United States
35%
18%
16%
28%
290
flagPakistan
39%
15%
12%
27%
33
flagAustria
20%
33%
20%
26%
15
flagAustralia
28%
10%
33%
25%
39
flagFrance
35%
15%
20%
25%
20
flagGermany
48%
15%
13%
22%
45
flagRussia
39%
20%
16%
21%
125
flagUkraine
46%
13%
14%
21%
119
flagUnknown
31%
15%
31%
21%
32
flagIndia
35%
20%
23%
19%
407
flagthe Netherlands
30%
26%
21%
17%
23
flagKazakhstan
31%
18%
31%
12%
16
flagRepublic of Ireland
63%
9%
9%
9%
11
flagthe Philippines
63%
8%
19%
5%
36