Astronomy

This map unfolds the entire night sky from sunset (at right) until sunrise (at left).

Arrows and colored dots show motions and locations of solar system objects during the month.

Jupiter’s moons

Io

Europa

S

WE

N

Ganymede

Callisto

ILLUSTRATIONS BY

ASTRONOMY

: ROEN KELLY

PER

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LYN

GEM

CNC

CMi

CMa

MON

ANT PYX

CRT

HYA

SEX

LEO

LMi

UMa

CRV

COM

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TAU

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LEP

PUP COL CAE

Objects visible in the evening

Early evening

Sun

Ceres Venus

Path

of^ th

e^ Sun

(eclip

tic)^

25 24 23 22 21 20 19 18 17 16 15

1 2 3 4 5 6 7 8 9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Callisto

Europa

Ganymede

Io

Jupiter

Ceres

Mars

Mercury

Earth

Uranus

Saturn

Pluto

Venus

Jupiter

Neptune

Jupiter

Opposition is May 8

WWW.ASTRONOMY.COM 41

Dots display positions

of Galilean satellites at

11 P.M. EDT on the date

shown. South is at the

top to match

the view

through a

telescope.

To locate the Moon in the sky, draw a line from the phase shown for the day straight up to the curved blue line.

Note: Moons vary in size due to the distance from Earth and are shown at 0h Universal Time.

The planets

in their orbits

Arrows show the inner planets’

monthly motions and dots

depict the outer planets’ posi-

tions at midmonth from high

above their orbits.