What are the most luminous objects in the universe?

supergiant stars
novae
supernovae
quasars
A quasar is an extremely energetic source of radiation powered by accretion disc around galaxy's central supermassive black hole. Quasars were much more common in the early universe, as all known quasars are extremely distant.
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Answers by country

supergiant stars
novae
supernovae
quasars
answers
flagRomania
9%
0%
18%
72%
11
flagPakistan
12%
4%
24%
60%
25
flagGreece
0%
0%
45%
54%
11
flagUnknown
2%
0%
47%
50%
36
flagAustralia
17%
6%
27%
48%
29
flagCanada
15%
6%
28%
46%
32
flagthe United Kingdom
8%
3%
44%
42%
106
flagMalaysia
14%
0%
42%
42%
14
flagIndonesia
30%
0%
30%
40%
10
flagIndia
17%
4%
38%
39%
320
flagthe United States
14%
4%
43%
38%
385
flagGermany
10%
1%
50%
37%
56
flagthe Philippines
32%
5%
27%
35%
37
flagSouth Africa
16%
0%
41%
33%
12
flagPoland
8%
4%
55%
31%
9947
flagthe United Arab Emirates
7%
7%
46%
30%
13
flagSingapore
10%
0%
60%
30%
10