Popular Astronomy

15

3

20

3

19

2

29

6

25

10

32

10

21

5

16

2

23

4

36

15

21

1

18

2

14

6

16

2

23

5

23

4

11

1

12

1

15

3

23

5

19

2

28

2

14

2

37

14

58

26

13

2

15

1

18

2

27

4

18

1

17

2

15

2

16

4

19

2

19

2

20

2

14

1

17

2

26

5

13

2