What properties do sunspots have?

Lower temperature and strong electric field

Higher temperature

Lower temperature and strong magnetic field

These are holes in the photosphere

Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic field flux that inhibit convection.

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Answers by country

France

82%

Canada

22%

61%

11%

Republic of Ireland

15%

61%

23%

Austria

14%

19%

56%

Poland

13%

16%

52%

16%

4909

the United States

17%

52%

11%

228

the Philippines

22%

51%

17%

Pakistan

15%

50%

19%

the United Arab Emirates

41%

50%

India

16%

20%

47%

14%

364

the United Kingdom

20%

16%

47%

13%

113

Germany

26%

16%

43%

11%

405

Greece

21%

42%

15%

Australia

14%

34%

37%

11%

the Netherlands

21%

35%

21%

Switzerland

28%

26%

33%

What are the most luminous objects in the universe?

What is the source of the most powerful release of energy in the universe, second in scale only to the Big Bang?

What was the most beautiful comet of the second half of the twentieth century, with two tails visible to the naked eye?

Halley's comet

Comet McNaught

Comet Hale-Bopp

There was no such comet

What is the name of the hypothetical last stage of the evolution of Sun-sized stars?