ASTRONOMY
TELESCOPE
EARTH
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GRAVITY
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ORBITS
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S
E
A
S
T
R
O
N
O
M
Y
W
O
V
U
G
R
A
V
I
T
Y
E
O
L
P
V
A
Q
O
B
E
I
G
C
D
A
L
E
G
R
S
L
K
Y
E
T
I
R
I
V
B
U
E
A
O
X
N
E
S
S
V
I
N
S
K
T
N
H
I
V
C
Y
T
N
C
U
Z
P
E
R
U
G
O
S
D
O
A
S
R
A
M
E
S
Z
V
T
P
I
E
A
R
T
H
E
J
U
E
E
H
F
I
J
B
G
I
A
P
R
R
M
