Astronomy

CAMELOPARDALIS

URSA

MINOR

CASSIOPEIA

LACERTA

CORONABOREALIS

CEPHEUS

LYRA

VULPECULA

SAGITTA

DRACO

HERCULES

PEGASUS

ANDROMEDA

CYGNUS

SERPENS

CAPUT

SERPENS

CAUDA

SCUTUM

OPHIUCHUS

L U

AQUILA

DELPHINUS

EQUULEUS

AQUARIUS

CAPRICORNUS

SCORPIUS

SAGITTARIUS

CORONA

AUSTRALIS

TELESCOPIUM

M57

M13

M15 M27

M4

NGC 6231

M6

M22

M16

M17

M20

M8

M7

Mizar

Polaris

M82

M81

Vega

Deneb

M31

NGC 869

NGC 884

M11

Enif

Altair

NCP

Antares

Saturn

Mars

38 ASTRONOMY • JULY 2018

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:

midnight July 1

11 P.M. July 15

10 P.M. July 31

Planets are shown

at midmonth