Astronomy - USA (2021-12)

JULY

SGR

OPH

HER

DRA

LY R

CYG

VUL

SGE

LAC

QR

CAP

MIC

CAS

AND

TRI

ARI

PEG

PSC

CET

SCL

PHE

GRU

SCO

TEL

PsA

CrA

of (^) th
e (^) Su
n (^) (e
clip
tic)
Early evening
Sun
Saturn
Neptune
Pluto
Pallas
Jupiter
Comet 19P/Borrelly
Co
me
t^ C
/^20
21
A^1
(Le
on
ar
d)
Mercury
Venus shines brightest in the
evening sky in early December
14 13 12 11 10 9 8 7 6 5 4
Callisto
Europa
Io
Ganymede
Jupiter
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
10"
N
S
WE
Mars
Ceres
Jupiter
Uranus
Saturn
Neptune Pluto
Io
Ganymede
Europa
Callisto
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
Dots display
positions of
Galilean satellites
at 9 P.M. EST on
the date shown.
South is at the
top to match the
view through a
telescope.
DECEMBER 2021
Dec. 15
1.6
3.9"
99%
2.425
1.558
15h54.7m
–20°16'
Dec. 15
7.4
0.7"
100%
1.796
2.752
3h57.6m
17°07'
Dec. 15
–2.2
36.9"
99%
5.345
4.996
21h59.0m
–13°25'
Dec. 15
0.6
15.7"
100%
10.569
9.923
20h50.2m
–18°34'
Dec. 15
5.7
3.7"
100%
18.982
19.725
2h34.9m
14°44'
Dec. 15

7. 8

2.3"

100%

29.952

29.921

23h25.6m

–4°57'

Dec. 15

15.2

0.1"

100%

35.251

34.422

19h49.6m

–22°47'

MARS CERES JUPITER SATURN URANUS NEPTUNE PLUTO

THE PLANETS IN THE SKY

These illustrations show the size, phase,

and orientation of each planet and the two

brightest dwarf planets at 0h UT for the dates

in the data table at bottom. South is at the top

to match the view through a telescope.