question edit history translations

What is the stellar day?

23 h 56 min 05 s

24 h 10 min 07 s

25 h 22 min 09 s

26 h 05 min 11 s

Sidereal time is a time-keeping system astronomers use to keep track of the direction to point their telescopes to view a given star in the night sky. It is a time scale that is based on the Earth's rate of rotation measured relative to the fixed stars rather than the Sun.

Krzysztof Moskal

3

wikipedia → Sidereal time

astronomystarstime

Time quiz Stars quiz Astronomy quiz

You will play as

Answers by country

Belarus

76%

6%

6%

10%

30

France

75%

8%

12%

4%

24

Ukraine

70%

19%

5%

4%

142

Kazakhstan

70%

23%

5%

0%

17

Republic of Ireland

69%

15%

7%

7%

26

Greece

69%

17%

8%

4%

23

Austria

68%

15%

7%

7%

77

Russia

67%

15%

8%

7%

157

Switzerland

65%

18%

5%

10%

38

Poland

64%

19%

10%

6%

9123

the United Kingdom

60%

26%

7%

5%

197

Unknown

59%

18%

3%

18%

32

Pakistan

56%

23%

12%

2%

39

Germany

55%

23%

12%

7%

398

the Netherlands

55%

33%

5%

0%

18

Canada

53%

26%

4%

14%

41

India

52%

29%

12%

4%

578

the United States

51%

30%

9%

6%

452

the Philippines

50%

27%

12%

8%

62

Australia

49%

28%

11%

6%

59

This unique line of about 20 stars is known as ...

Kemble's cascade

What is the densest substance in the universe?

core of the Sun

Which direction was the camera pointing at while taking this picture?

Which animal has three hearts?

short-eared owl

there is no such animal