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THE SOLAR
SYSTEM
Page 2


THE SOLAR
SYSTEM
O B J E C T I V E S
D e s c r i b e t h e S o l a r S y s t e m .
E x p l a i n h o w t h e s o l a r s y s t e m f o r m e d .
D e s c r i b e t h e S u n , t h e e i g h t p l a n e t s ,
a n d t h e s p a c e r o c k s .
Page 3


THE SOLAR
SYSTEM
O B J E C T I V E S
D e s c r i b e t h e S o l a r S y s t e m .
E x p l a i n h o w t h e s o l a r s y s t e m f o r m e d .
D e s c r i b e t h e S u n , t h e e i g h t p l a n e t s ,
a n d t h e s p a c e r o c k s .
I N T R O D U C T I O N
T h e s o l a r s y s t e m i s m a d e u p o f t h e S u n
a n d e v e r y t h i n g t h a t o r b i t s o r m o v e s
a r o u n d i t . T h i s i n c l u d e s t h e p l a n e t s ,
m o o n s , d w a r f p l a n e t s , a n d s p a c e r o c k s
( c o m e t s , m e t e o r s , a n d a s t e r o i d s ) .
Page 4


THE SOLAR
SYSTEM
O B J E C T I V E S
D e s c r i b e t h e S o l a r S y s t e m .
E x p l a i n h o w t h e s o l a r s y s t e m f o r m e d .
D e s c r i b e t h e S u n , t h e e i g h t p l a n e t s ,
a n d t h e s p a c e r o c k s .
I N T R O D U C T I O N
T h e s o l a r s y s t e m i s m a d e u p o f t h e S u n
a n d e v e r y t h i n g t h a t o r b i t s o r m o v e s
a r o u n d i t . T h i s i n c l u d e s t h e p l a n e t s ,
m o o n s , d w a r f p l a n e t s , a n d s p a c e r o c k s
( c o m e t s , m e t e o r s , a n d a s t e r o i d s ) .
HOW DID THE SOLAR SYSTEM FORM?
S c i e n t i s t s b e l i e v e t h a t t h e s o l a r s y s t e m
f o r m e d a b o u t 4 . 6 b i l l i o n y e a r s a g o .
F i r s t , t h e S u n w a s b o r n f r o m a s p i n n i n g
c l o u d o f d u s t a n d h o t g a s e s . N e x t , t h e
r o c k s , d u s t , a n d g a s p a r t i c l e s t h a t o r b i t
a r o u n d t h e S u n f o r m e d t h e p l a n e t s . T h e
l e f t o v e r m a t e r i a l s s t u c k t o g e t h e r a n d
b e c a m e c o m e t s , a s t e r o i d s , a n d m e t e o r s .
Page 5


THE SOLAR
SYSTEM
O B J E C T I V E S
D e s c r i b e t h e S o l a r S y s t e m .
E x p l a i n h o w t h e s o l a r s y s t e m f o r m e d .
D e s c r i b e t h e S u n , t h e e i g h t p l a n e t s ,
a n d t h e s p a c e r o c k s .
I N T R O D U C T I O N
T h e s o l a r s y s t e m i s m a d e u p o f t h e S u n
a n d e v e r y t h i n g t h a t o r b i t s o r m o v e s
a r o u n d i t . T h i s i n c l u d e s t h e p l a n e t s ,
m o o n s , d w a r f p l a n e t s , a n d s p a c e r o c k s
( c o m e t s , m e t e o r s , a n d a s t e r o i d s ) .
HOW DID THE SOLAR SYSTEM FORM?
S c i e n t i s t s b e l i e v e t h a t t h e s o l a r s y s t e m
f o r m e d a b o u t 4 . 6 b i l l i o n y e a r s a g o .
F i r s t , t h e S u n w a s b o r n f r o m a s p i n n i n g
c l o u d o f d u s t a n d h o t g a s e s . N e x t , t h e
r o c k s , d u s t , a n d g a s p a r t i c l e s t h a t o r b i t
a r o u n d t h e S u n f o r m e d t h e p l a n e t s . T h e
l e f t o v e r m a t e r i a l s s t u c k t o g e t h e r a n d
b e c a m e c o m e t s , a s t e r o i d s , a n d m e t e o r s .
THE SUN
T h e S u n i s t h e c e n t e r o f t h e
S o l a r S y s t e m a n d i s c o m p o s e d
m o s t l y o f h y d r o g e n a n d h e l i u m . I t
i s t h e s o u r c e o f t h e e n e r g y w h i c h
m a k e s l i f e o n E a r t h p o s s i b l e . T h e
e i g h t p l a n e t s o r b i t a r o u n d t h e
S u n i n e l l i p t i c a l o r b i t s .
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