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
flagPakistan
11%
2%
23%
61%
34
flagRomania
6%
0%
33%
60%
15
flagUnknown
2%
0%
47%
50%
36
flagFrance
0%
4%
48%
48%
25
flagthe United States
12%
3%
39%
44%
514
flagthe Philippines
24%
4%
26%
44%
49
flagCanada
13%
6%
33%
44%
45
flagAustralia
15%
3%
35%
43%
64
flagGreece
0%
4%
52%
43%
23
flagMalaysia
17%
0%
41%
41%
17
flagAustria
9%
0%
50%
40%
55
flagthe United Arab Emirates
6%
6%
40%
40%
15
flagthe United Kingdom
10%
4%
44%
39%
195
flagthe Netherlands
11%
0%
52%
35%
17
flagIndia
19%
4%
40%
34%
581
flagPoland
8%
4%
53%
33%
11938
flagGermany
14%
3%
47%
33%
328
flagSwitzerland
12%
0%
54%
33%
24
flagSouth Africa
13%
0%
46%
33%
15
flagRepublic of Ireland
0%
6%
73%
20%
15