Astronomy

CORONA

AUSTRALIS

TELESCOPIUM

SCUTUM

LACERTA

LY R A

VULPECULA

SAGITTA

AQUILA

DELPHINUS

EQUULEUS

AQUARIUS

CAPRICORNUS

CYGNUS

MICROSCOPIUM SAGITTARIUS

GRUS

INDUS

PISCIS

AUSTRINUS

PEGASUS

SCULPTOR

CETUS

CAMELOPARDALIS

URSA

MINOR

NCP

CASSIOPEIA

PERSEUS

CEPHEUS

DRACO

PISCES

TRIANGULUMANDROMEDA

M16

M17

M20

M8

M^7

M22

M57

Vega

M27

Enif M15

Deneb

Altair

Fomalhaut

M82

M81

M33

M31

M11

NGC 869 Polaris

NGC 884

Pa

th

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38 ASTRONOMY • SEPTEMBER 2017
STAR
DOME
Sirius
0.0
1.0
2.0
E
N
S
NE
SE
3.0
4.0
5.0
STAR
MAGNITUDES
STAR COLORS
A star’s color depends
on its surface temperature.

• The hottest stars shine blue


• Slightly cooler stars appear white


• Intermediate stars (like the Sun) glow yellow


• Lower-temperature stars appear orange


• The coolest stars glow red


• Fainter stars can’t excite our eyes’ color
  receptors, so they appear white unless you
  use optical aid to gather more light

How to use this map: This map portrays the

sky as seen near 35° north latitude. Located

inside the border are the cardinal directions

and their intermediate points. To find

stars, hold the map overhead and

orient it so one of the labels matches

the direction you’re facing. The

stars above the map’s horizon

now match what’s in the sky.

The all-sky map shows

how the sky looks at:

10 P.M. September 1

9 P.M. September 15

8 P.M. September 30

Planets are shown

at midmonth