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
flagGreece
23%
17%
23%
35%
17
flagPoland
32%
16%
15%
33%
9068
flagthe United Kingdom
35%
11%
16%
33%
145
flagthe United States
33%
17%
16%
31%
312
flagBelarus
25%
20%
25%
30%
20
flagPakistan
39%
15%
12%
27%
33
flagSouth Africa
54%
9%
9%
27%
11
flagGermany
50%
14%
9%
26%
64
flagAustria
20%
33%
20%
26%
15
flagAustralia
30%
10%
32%
25%
40
flagthe Netherlands
25%
22%
22%
25%
27
flagFrance
35%
15%
20%
25%
20
flagRussia
38%
19%
15%
22%
126
flagUkraine
47%
13%
14%
21%
121
flagUnknown
31%
15%
31%
21%
32
flagIndia
35%
20%
23%
19%
409
flagKazakhstan
31%
18%
31%
12%
16
flagRepublic of Ireland
58%
8%
16%
8%
12
flagthe Philippines
63%
8%
19%
5%
36