Astronomy

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C R

VIRGO

COMA

BERENICES

CORVUS

LIBRA

H Y

CAPUTSERPENS

CAUDASERPENS

SCUTUM

OPHIUCHUS

SCORPIUS

LUPUS

CENTAURUS

CASSIOPEIA

C AMELOPARDALIS

URSA

MINOR

CEPHEUS

LACERTA

BOÖTES CANES VENATICI

BOREALISCORONA

CYGNUS

RSAU

AJ

OR

SAGITTAVULPECULA

DRACO

HERCULES

AQUILA

LY R A

Polaris

NCP

M51

M82

M81

Mizar

Arcturus M64

NGP

Denebola

M66

M57

Deneb

M27

M13

Vega

Spica

M104

M16

Antares

M4

M83

M5

NGC 5128

Path of the Sun (ecliptic) Jupiter

38 ASTRONOMY • MAY 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 May 1

11 P.M. May 15

10 P.M. May 31

Planets are shown

at midmonth