Sky and Telescope - January 2017 - SGA17EAL

2017

Skygazer's 50°N
Almanac
FOR L ATITUDES
NEAR 50° NORTH

E V E N IN G

s

a
Tr

A

Equation
of time

Ju

w

R
15

A

N
16

905

Rise

JUNE

J
18

M

Ri

se

16

A

er

C

in

a

P

le

ia

N

s
de

e

a
Tr

u
pt

i
ns

t

Se

O

ts

on

eb

r
Si

iu

s

an
Tr

si

ts
P

ol

l

ne

Geminids

6

24

U

r

u
an

s

Se

ts

R

e

13

20

l
gu

a
Tr

i
ns

ts

us

Conjunction
(appulse)

6
Greatest
elongation

7

8
Greatest illuminated extent

9
Opposition

10

11
New
Moon

Midnight

First
Quarter

Full
Moon

1

2
Last
Quarter

3
A Apogee

4
P Perigee

5
Waxing
(moonset)

6

27

JAN

4
11

A

5 p.m.

R

6

Leonids

5

Set

n

E
MB

42

a
Tr

N

ri

N

a
ul

M

ux

t
twiligh

U

pp

m
ul

n
tio

4

Northern
Taurids

ns

a
nt

R

is

es

re

s

7 a.m.
Waning
(moonrise)

BER

ri

es

s

a
Tr

18
25

DECEM

Si

Rise

is

P

ol

i
ar

Southern
Taurids

3

rise

P

us

R

of

Sun
fast

E
OV

r

s

s

s

U

A

u
an

an
Tr

ts
si

rR
is
e

Rise

Sky & Telescope
90 Sherman St.
Cambridge, MA
02140
USA

30

its

te

ge

i

its

23

Orionids

pi

el

R

s
se

skyandtelescope.com

2

s

9

Ju

et

e
us

U A RY

is e
Sunr

25

Rises
Set

P

RY

T

ry

O

En
do
fe
ve
nin
gt

R

BE

cu

Set

Mars

OC

058

EMB

er

®

Sun

NOV

M

24

18

g
ornin

088

11

of m

MBER

tu

n

t
Star

DECE

N

ep

ne

a
Tr

4

23

A

B

Set s

Su ns et

17

P

ts
si

Computed by Roger W. Sinnott,
Sky & Telescope Magazine
© 2017 F+W Media, Inc.

28

A

O
CT

ht
wi
lig

SE

PT

EM

BE

Rise

S

S
R atu
is r n
es

tu

R

99

7

Sa

rn

21

R
BE

22

s
et

S

eb

14

P

B

en

7

Perseids

EM

GU

AU

D

Set

10

A

21

its

P

Delta
Aquariids

2

19

3

P

Rise

12

26

us

1

y

ER

5

es

A

Rise

A

22

29

n
ra

is

Y
JUL

JUL
Y

966

ST

Tr

s
an

TO

15

its

r

Set

P

8

M e rc u r

Jul
ian

da
y2
,45

8,0

00
+

02
7

1

te

20

17

24

s
an

es
Ris

Dec 12
Dec 21

e

Tr

s
Venu

Dec 9

es

Rise

s

Dec 6

un

19

Set

935

cury

Sep 4
Sep 22
Oct 19
Nov 23

U

er

Aug 21

i
up

R
Set

t
ep

is

rn
tu
a
S ets
S

Set

17

20

RI

Lyrids

er

Y

Aug 7

St
art

n

rn

MA

Jul 29

Latest onset
of morning
twilight
27
s
Jan 19 Mercury
u
n
reaches greatest
3
elongation, 24°
west of the Sun
10
Feb 11 Moon is deep inside
Earth's penumbra shortly
17
before 1h UT for Europe
and western Asia
24
Mar 20 Spring begins at the equinox,
1
10:29 UT
Mar 25 Venus reaches inferior con8
junction, passing 8° north of
the Sun
15
May 18 Mercury comes to greatest
elongation, standing 26° west of
22
the Sun
P
Jun 3 Venus is at greatest elongation, 46°
29
west of the Sun; Uranus is 1.7° north
of Venus
5 A
Jun 16 Earliest sunrise at latitude 50° north
12
Jun 21 Summer begins at the solstice, 4:24 UT
Sep 10 Regulus is 0.6° upper left of Mercury
19
Sep 12 Mercury is at greatest elongation, 18°
west of the Sun
26
Sep 17 Mars is 0.4° to the upper right of Mercury
(use binoculars)
3
Sep 20 Regulus is 0.5° to the right of Venus
10
Mars is 0.4° from Venus both today and
Oct 5
tomorrow
17
Nov 13 Jupiter is just 0.3° to the lower right
of Venus
24
Nov 29 Spica is 3.1° lower right of Mars
today and tomorrow
31
Dec 31 Latest sunrise of the year

s
se
Ri

Jan 3

L

i

MORNING SKY

13

T
EP

Rise

tu

Lo

6

Y

Sa

is

m

20

JUNE

874

R

Set

14

es

ul

13

MA

A

C

io

a

6

AP

Rise

t
na

ol

s
ri

ury
Rise
s

844

13
A

30

Ve

Set

P

P

of

23

27

A

P

IL
PR

Jun 25
Jul 3

r

11

12

ts

MA

Apr 7
Jun 14
Jun 21

te
pi

ns

its

of
mo
rni
ng

ts

lu

ns

a

i

tw
ilig

ts
Se

R

u
eg

a
Tr

s
it

nt

R

P

9

Rise

Mars Sets

Apr 1

A

s

RC

H

12

Set

us

n
Ve

P

nu

5

t
ligh
twi

813

g
nin

Se

eve

Feb 26

r

te

es

s
re

16

UA

J

i
up

is

Sun
slow

s
se

BR

ux

n

R

A

FE

l

a
Tr

ts
si

8

CH

la

s

iu

ts

si

AR

r
Si

ol

9

M

an
Tr

of

Jan 12

Quadrantids
P

42

P

7 a.m.

Set

10

Neptune lies
19
just 0.1° to the
west of Mars
26
Earth is
147,100,998 km
2
from the Sun
h
(perihelion) at 14 UT
9
Se
Venus stands at greatest
y
r
u
elongation, 47° east of
16 M e rc
the Sun; Neptune is 0.5°
southeast of Venus
23
Annular solar eclipse in a
30
narrow path across southern
South America and Africa;
7
Uranus is 0.7° southeast of Mars
Mercury attains greatest
14
elongation, 19° east of the Sun
Jupiter comes to opposition tonight
21
Saturn is at opposition
P
Longest day, lasting 16h 22m at latitude
28
50° north
4
Latest sunset
Earth is 152,092,504 km from the Sun
11
(aphelion) at 20h UT
Mercury reaches greatest elongation, 27°
18
east of the Sun
P
A slight partial lunar eclipse, best seen
25
in the Middle East and Asia from 17:22
to 19:19 UT
2
Total solar eclipse in a path across the
9
United States, with the end of the partial
phase visible in western Europe and the
16
United Kingdom
Neptune is at opposition tonight
23
Fall begins at the equinox, 20:02 UT
Uranus comes to opposition
30
Mercury is at greatest elongation,
6
22° east of the Sun
Mercury and Saturn are 1.3°
13
apart (use binoculars)
Earliest end of evening
20
twilight
Set
Earliest sunset
27
Winter begins at the
solstice, 16:28 UT;
3
shortest day, 8h 04m
at latitude 50°
10
north

Jan 4

u

6

ER

on

eb

5

US

ri

N

4

G
AU

Set

3

its
Rise

Rise

26

EVENING SKY
Jan 1

M

End

19

FE

Tr

s
an

ra

AR

d

n

O

U
BR

12

C

er

i

ia

2

y Rises

U

pp

m

P

le

a
Tr

t
si

U

J

Y

5

ul

n

1

rc u r

785

29

na

tio

Midnight
7

ris

es

11

Me

Si

u
ri

of

10

Se
ts

U
AN

set

22

ian
Ju l

s
nu s
ra sit ses
U n i
a R
Tr s

Sun

15

P

a
ol

N

AR

Y

8

9

A S U P P L E ME NT T O SKY & TELESCOPE

ht

8

M e rc

7

e

6

ep
tu
n

0+
7,00
2,45
y
a
d
754

5 p.m.

M ORNI NG


http://www.skyandtelescope.com

Sky and Telescope - January 2017

Table of Contents for the Digital Edition of Sky and Telescope - January 2017

Contents
Sky and Telescope - January 2017 - Cover1
Sky and Telescope - January 2017 - Cover2
Sky and Telescope - January 2017 - 1
Sky and Telescope - January 2017 - Contents
Sky and Telescope - January 2017 - 3
Sky and Telescope - January 2017 - 4
Sky and Telescope - January 2017 - 5
Sky and Telescope - January 2017 - 6
Sky and Telescope - January 2017 - 7
Sky and Telescope - January 2017 - 8
Sky and Telescope - January 2017 - 9
Sky and Telescope - January 2017 - 10
Sky and Telescope - January 2017 - 11
Sky and Telescope - January 2017 - 12
Sky and Telescope - January 2017 - 13
Sky and Telescope - January 2017 - 14
Sky and Telescope - January 2017 - 15
Sky and Telescope - January 2017 - 16
Sky and Telescope - January 2017 - 17
Sky and Telescope - January 2017 - 18
Sky and Telescope - January 2017 - 19
Sky and Telescope - January 2017 - 20
Sky and Telescope - January 2017 - 21
Sky and Telescope - January 2017 - 22
Sky and Telescope - January 2017 - 23
Sky and Telescope - January 2017 - 24
Sky and Telescope - January 2017 - 25
Sky and Telescope - January 2017 - 26
Sky and Telescope - January 2017 - 27
Sky and Telescope - January 2017 - 28
Sky and Telescope - January 2017 - 29
Sky and Telescope - January 2017 - 30
Sky and Telescope - January 2017 - 31
Sky and Telescope - January 2017 - 32
Sky and Telescope - January 2017 - 33
Sky and Telescope - January 2017 - 34
Sky and Telescope - January 2017 - 35
Sky and Telescope - January 2017 - 36
Sky and Telescope - January 2017 - 37
Sky and Telescope - January 2017 - 38
Sky and Telescope - January 2017 - 39
Sky and Telescope - January 2017 - 40
Sky and Telescope - January 2017 - 41
Sky and Telescope - January 2017 - 42
Sky and Telescope - January 2017 - 43
Sky and Telescope - January 2017 - 44
Sky and Telescope - January 2017 - 45
Sky and Telescope - January 2017 - 46
Sky and Telescope - January 2017 - 47
Sky and Telescope - January 2017 - 48
Sky and Telescope - January 2017 - 49
Sky and Telescope - January 2017 - 50
Sky and Telescope - January 2017 - 51
Sky and Telescope - January 2017 - 52
Sky and Telescope - January 2017 - 53
Sky and Telescope - January 2017 - 54
Sky and Telescope - January 2017 - 55
Sky and Telescope - January 2017 - 56
Sky and Telescope - January 2017 - 57
Sky and Telescope - January 2017 - 58
Sky and Telescope - January 2017 - 59
Sky and Telescope - January 2017 - 60
Sky and Telescope - January 2017 - 61
Sky and Telescope - January 2017 - 62
Sky and Telescope - January 2017 - 63
Sky and Telescope - January 2017 - 64
Sky and Telescope - January 2017 - 65
Sky and Telescope - January 2017 - 66
Sky and Telescope - January 2017 - 67
Sky and Telescope - January 2017 - 68
Sky and Telescope - January 2017 - 69
Sky and Telescope - January 2017 - 70
Sky and Telescope - January 2017 - 71
Sky and Telescope - January 2017 - 72
Sky and Telescope - January 2017 - 73
Sky and Telescope - January 2017 - 74
Sky and Telescope - January 2017 - 75
Sky and Telescope - January 2017 - 76
Sky and Telescope - January 2017 - 77
Sky and Telescope - January 2017 - 78
Sky and Telescope - January 2017 - 79
Sky and Telescope - January 2017 - 80
Sky and Telescope - January 2017 - 81
Sky and Telescope - January 2017 - 82
Sky and Telescope - January 2017 - 83
Sky and Telescope - January 2017 - 84
Sky and Telescope - January 2017 - Cover3
Sky and Telescope - January 2017 - Cover4
Sky and Telescope - January 2017 - SGA17RAL
Sky and Telescope - January 2017 - 90
Sky and Telescope - January 2017 - SGA17R
Sky and Telescope - January 2017 - SGA17RA
Sky and Telescope - January 2017 - SGA17EAL
Sky and Telescope - January 2017 - 94
Sky and Telescope - January 2017 - SGA17E
Sky and Telescope - January 2017 - SGA17EA
Sky and Telescope - January 2017 - SGA17SAL
Sky and Telescope - January 2017 - 98
Sky and Telescope - January 2017 - SGA17S
Sky and Telescope - January 2017 - SGA17SA
https://www.nxtbook.com/nxtbooks/aas/st_202504
https://www.nxtbook.com/nxtbooks/aas/st_202501_qr
https://www.nxtbook.com/nxtbooks/aas/st_202503
https://www.nxtbook.com/nxtbooks/aas/st_202502
https://www.nxtbook.com/nxtbooks/aas/st_202501
https://www.nxtbook.com/nxtbooks/aas/st_202412
https://www.nxtbook.com/nxtbooks/aas/st_202411
https://www.nxtbook.com/nxtbooks/aas/st_202410
https://www.nxtbook.com/nxtbooks/aas/st_202409
https://www.nxtbook.com/nxtbooks/aas/st_202408
https://www.nxtbook.com/nxtbooks/aas/st_202407
https://www.nxtbook.com/nxtbooks/aas/st_202406
https://www.nxtbook.com/nxtbooks/aas/st_202405
https://www.nxtbook.com/nxtbooks/aas/st_202404_qr
https://www.nxtbook.com/nxtbooks/aas/st_202404
https://www.nxtbook.com/nxtbooks/aas/st_202403
https://www.nxtbook.com/nxtbooks/aas/st_202402
https://www.nxtbook.com/nxtbooks/aas/st_202401_aus
https://www.nxtbook.com/nxtbooks/aas/st_202401
https://www.nxtbook.com/nxtbooks/aas/st_202312_aus
https://www.nxtbook.com/nxtbooks/aas/st_202312
https://www.nxtbook.com/nxtbooks/aas/st_202311
https://www.nxtbook.com/nxtbooks/aas/st_202310
https://www.nxtbook.com/nxtbooks/aas/st_202309
https://www.nxtbook.com/nxtbooks/aas/st_202308
https://www.nxtbook.com/nxtbooks/aas/st_202307
https://www.nxtbook.com/nxtbooks/aas/st_202306
https://www.nxtbook.com/nxtbooks/aas/st_202305
https://www.nxtbook.com/nxtbooks/aas/st_202304
https://www.nxtbook.com/nxtbooks/aas/st_202304_qr
https://www.nxtbook.com/nxtbooks/aas/st_202303
https://www.nxtbook.com/nxtbooks/aas/st_202302
https://www.nxtbook.com/nxtbooks/aas/st_202301
https://www.nxtbook.com/nxtbooks/aas/st_202212
https://www.nxtbook.com/nxtbooks/aas/st_202211
https://www.nxtbook.com/nxtbooks/aas/st_202210
https://www.nxtbook.com/nxtbooks/aas/st_202209
https://www.nxtbook.com/nxtbooks/aas/st_202208
https://www.nxtbook.com/nxtbooks/aas/st_202207
https://www.nxtbook.com/nxtbooks/aas/st_202206
https://www.nxtbook.com/nxtbooks/aas/st_202205
https://www.nxtbook.com/nxtbooks/aas/st_202204
https://www.nxtbook.com/nxtbooks/aas/st_202203
https://www.nxtbook.com/nxtbooks/aas/st_202202
https://www.nxtbook.com/nxtbooks/aas/st_202201
https://www.nxtbook.com/nxtbooks/aas/st_202112
https://www.nxtbook.com/nxtbooks/aas/st_202111
https://www.nxtbook.com/nxtbooks/aas/st_202110
https://www.nxtbook.com/nxtbooks/aas/st_202109
https://www.nxtbook.com/nxtbooks/aas/st_202108
https://www.nxtbook.com/nxtbooks/aas/st_202107
https://www.nxtbook.com/nxtbooks/aas/st_202106
https://www.nxtbook.com/nxtbooks/aas/st_202105
https://www.nxtbook.com/nxtbooks/aas/st_202104
https://www.nxtbook.com/nxtbooks/aas/st_202103
https://www.nxtbook.com/nxtbooks/aas/st_202102
https://www.nxtbook.com/nxtbooks/aas/st_202101
https://www.nxtbook.com/nxtbooks/aas/skywatch_2021
https://www.nxtbook.com/nxtbooks/aas/st_202012
https://www.nxtbook.com/nxtbooks/aas/st_202011
https://www.nxtbook.com/nxtbooks/aas/st_202010
https://www.nxtbook.com/nxtbooks/aas/st_202009
https://www.nxtbook.com/nxtbooks/aas/st_202008
https://www.nxtbook.com/nxtbooks/aas/st_202007
https://www.nxtbook.com/nxtbooks/aas/st_202006
https://www.nxtbook.com/nxtbooks/aas/st_202005
https://www.nxtbook.com/nxtbooks/aas/st_202004
https://www.nxtbook.com/nxtbooks/aas/st_202003
https://www.nxtbook.com/nxtbooks/aas/st_202002
https://www.nxtbook.com/nxtbooks/aas/st_202001
https://www.nxtbook.com/nxtbooks/aas/st_201912
https://www.nxtbook.com/nxtbooks/aas/st_201911
https://www.nxtbook.com/nxtbooks/aas/st_201910
https://www.nxtbook.com/nxtbooks/aas/st_201909
https://www.nxtbook.com/nxtbooks/aas/st_201908
https://www.nxtbook.com/nxtbooks/aas/st_201907
https://www.nxtbook.com/nxtbooks/aas/st_201906
https://www.nxtbook.com/nxtbooks/aas/st_201905
https://www.nxtbook.com/nxtbooks/aas/st_201904
https://www.nxtbook.com/nxtbooks/aas/st_201903
https://www.nxtbook.com/nxtbooks/aas/st_201902
https://www.nxtbook.com/nxtbooks/aas/st_201901
https://www.nxtbook.com/nxtbooks/aas/st_201812
https://www.nxtbook.com/nxtbooks/aas/st_201811
https://www.nxtbook.com/nxtbooks/aas/st_201810
https://www.nxtbook.com/nxtbooks/aas/st_201809
https://www.nxtbook.com/nxtbooks/aas/st_201808
https://www.nxtbook.com/nxtbooks/aas/st_201807
https://www.nxtbook.com/nxtbooks/aas/st_201806
https://www.nxtbook.com/nxtbooks/aas/st_201805
https://www.nxtbook.com/nxtbooks/aas/st_201804
https://www.nxtbook.com/nxtbooks/aas/st_201803
https://www.nxtbook.com/nxtbooks/aas/st_201802
https://www.nxtbook.com/nxtbooks/aas/st_201801
https://www.nxtbook.com/nxtbooks/aas/st_201712
https://www.nxtbook.com/nxtbooks/aas/st_201711
https://www.nxtbook.com/nxtbooks/aas/st_201710
https://www.nxtbook.com/nxtbooks/aas/st_201709
https://www.nxtbook.com/nxtbooks/aas/st_201708
https://www.nxtbook.com/nxtbooks/aas/st_201707
https://www.nxtbook.com/nxtbooks/aas/st_201706
https://www.nxtbook.com/nxtbooks/aas/st_201705
https://www.nxtbook.com/nxtbooks/aas/st_201704
https://www.nxtbook.com/nxtbooks/aas/st_201703
https://www.nxtbook.com/nxtbooks/aas/st_201702
https://www.nxtbook.com/nxtbooks/aas/st_201701
https://www.nxtbook.com/nxtbooks/aas/st_201612
https://www.nxtbook.com/nxtbooks/aas/st_201611
https://www.nxtbook.com/nxtbooks/aas/st_201610
https://www.nxtbook.com/nxtbooks/aas/st_201609
https://www.nxtbook.com/nxtbooks/aas/st_201608
https://www.nxtbook.com/nxtbooks/aas/st_201607
https://www.nxtbook.com/nxtbooks/aas/st_201606
https://www.nxtbook.com/nxtbooks/aas/st_201605
https://www.nxtbook.com/nxtbooks/aas/st_201604
https://www.nxtbook.com/nxtbooks/aas/st_201603
https://www.nxtbook.com/nxtbooks/aas/st_201602
https://www.nxtbook.com/nxtbooks/aas/st_201601
https://www.nxtbook.com/nxtbooks/aas/st_201512
https://www.nxtbook.com/nxtbooks/aas/st_201511
https://www.nxtbook.com/nxtbooks/aas/st_201510
https://www.nxtbook.com/nxtbooks/aas/st_201509
https://www.nxtbook.com/nxtbooks/aas/st_201508
https://www.nxtbook.com/nxtbooks/aas/st_201507
https://www.nxtbook.com/nxtbooks/aas/st_201506
https://www.nxtbook.com/nxtbooks/aas/st_201505
https://www.nxtbook.com/nxtbooks/aas/st_201504
https://www.nxtbook.com/nxtbooks/aas/st_201503
https://www.nxtbook.com/nxtbooks/aas/st_201502
https://www.nxtbook.com/nxtbooks/aas/st_201501
https://www.nxtbook.com/nxtbooks/aas/st_201412
https://www.nxtbook.com/nxtbooks/aas/st_201411
https://www.nxtbook.com/nxtbooks/aas/st_201410
https://www.nxtbook.com/nxtbooks/aas/st_201409
https://www.nxtbook.com/nxtbooks/aas/st_201408
https://www.nxtbook.com/nxtbooks/aas/st_201407
https://www.nxtbook.com/nxtbooks/aas/st_201406
https://www.nxtbook.com/nxtbooks/aas/st_mars
https://www.nxtbook.com/nxtbooks/aas/st_201405
https://www.nxtbook.com/nxtbooks/aas/st_201404
https://www.nxtbook.com/nxtbooks/aas/st_201403
https://www.nxtbook.com/nxtbooks/aas/st_201402
https://www.nxtbook.com/nxtbooks/aas/st_201401
https://www.nxtbook.com/nxtbooks/aas/st_201312
https://www.nxtbook.com/nxtbooks/aas/st_201311
https://www.nxtbook.com/nxtbooks/aas/st_201310
https://www.nxtbook.com/nxtbooks/aas/st_201309
https://www.nxtbook.com/nxtbooks/aas/st_201308
https://www.nxtbook.com/nxtbooks/aas/st_201307
https://www.nxtbook.com/nxtbooks/aas/st_201306
https://www.nxtbook.com/nxtbooks/aas/st_201305
https://www.nxtbook.com/nxtbooks/aas/st_201304
https://www.nxtbook.com/nxtbooks/aas/st_201303
https://www.nxtbook.com/nxtbooks/aas/st_201302
https://www.nxtbook.com/nxtbooks/aas/st_201301
https://www.nxtbook.com/nxtbooks/aas/st_201212
https://www.nxtbook.com/nxtbooks/aas/st_201211
https://www.nxtbook.com/nxtbooks/aas/st_201210
https://www.nxtbook.com/nxtbooks/aas/st_201209
https://www.nxtbook.com/nxtbooks/aas/st_201208
https://www.nxtbook.com/nxtbooks/aas/st_201207
https://www.nxtbook.com/nxtbooks/aas/st_201206
https://www.nxtbook.com/nxtbooks/aas/st_201205
https://www.nxtbook.com/nxtbooks/aas/st_201204
https://www.nxtbook.com/nxtbooks/aas/st_201203
https://www.nxtbook.com/nxtbooks/aas/st_201202
https://www.nxtbook.com/nxtbooks/aas/st_201201
https://www.nxtbook.com/nxtbooks/aas/st_201112
https://www.nxtbook.com/nxtbooks/aas/st_201111
https://www.nxtbook.com/nxtbooks/aas/st_201110
https://www.nxtbook.com/nxtbooks/aas/st_201109
https://www.nxtbook.com/nxtbooks/aas/st_201108
https://www.nxtbook.com/nxtbooks/aas/st_201107
https://www.nxtbook.com/nxtbooks/aas/st_201106
https://www.nxtbook.com/nxtbooks/aas/st_201105
https://www.nxtbook.com/nxtbooks/aas/st_201104
https://www.nxtbook.com/nxtbooks/aas/st_201103
https://www.nxtbook.com/nxtbooks/aas/st_201102
https://www.nxtbook.com/nxtbooks/aas/st_201101
https://www.nxtbook.com/nxtbooks/aas/st_201012
https://www.nxtbook.com/nxtbooks/aas/st_201011
https://www.nxtbook.com/nxtbooks/aas/st_201010
https://www.nxtbook.com/nxtbooks/aas/st_201009
https://www.nxtbook.com/nxtbooks/aas/st_201008
https://www.nxtbook.com/nxtbooks/aas/st_201007
https://www.nxtbook.com/nxtbooks/aas/st_201006
https://www.nxtbook.com/nxtbooks/aas/st_201005
https://www.nxtbook.com/nxtbooks/aas/st_201004
https://www.nxtbook.com/nxtbooks/aas/st_201003
https://www.nxtbook.com/nxtbooks/aas/st_201002
https://www.nxtbook.com/nxtbooks/aas/st_201001
https://www.nxtbookmedia.com