q u �  �o   t r � n .   � n g   t i n   v � o   i �u   �   b �i   v �   � n g   c �m   t h �y   -   d o   n h �n g   n g u y � n   n h � n   b �   �n   n � o   �   -   r �n g   t r � i   �t   l �   t r u n g   t � m   c �a   v i  t r �,   r �n g   c h u y �n   �n g   t r � n   l �   c h u y �n   �n g   h o � n   t h i �n   n h �t .   �   t ��n g   n � y   �   ��c   P t o l e m y   p h � t   t r i �n   t h � n h   m �t   m �   h � n h   v i  t r �  h o � n   c h �n h   v � o   t h �  k �  t h �  2   s a u   C � n g   n g u y � n .   T h e o   m �   h � n h   n � y   t h �   t r � i   �t   �n g   �  t � m   v �   b a o   q u a n h   n �   l �   8   m �t   c �u   t ��n g   �n g   m a n g   m �t   t r n g ,   m �t   t r �i ,   c � c   n g � i   s a o   v �   5   h � n h   t i n h   �   b i �t   v � o   t h �i   g i a n   � :   s a o   T h �y ,   s a o     
 
 
 
 K i m ,   s a o   H �a ,   s a o   M �c   v �   s a o   T h �  ( H � n h   1 . 1 ) .   C h � n h   c � c   h � n h   t i n h   l �i   p h �i   c h u y �n   �n g   t r � n   n h �n g   v � n g   t r � n   n h �  h �n   g �n   v �i   c � c   m �t   c �u   t ��n g   �n g   c �a   c h � n g   �  p h �   h �p   v �i   ��n g   i   q u a n   s � t   ��c   t ��n g   �i   p h �c   t �p   c �a   c h � n g   t r � n   b �u   t r �i .   M �t   c �u   n g o � i   c � n g   m a n g   c � c   t h i � n   t h �  ��c   g �i   l �   c � c   n g � i   s a o   c �  �n h ,   c h � n g   l u � n   l u � n   �  n h �n g   v �  t r �   c �  �n h   �i   v �i   n h a u ,   n h �n g   l �i   c � n g   n h a u   q u a y   n g a n g   q u a   b �u   t r �i .   B � n   n g o � i   m �t   c �u   c u �i   c � n g   �   l �   c � i   g �   t h �   m �   h � n h   �   k h � n g   b a o   g i �  n � i   m �t   c � c h   r �   r � n g ,   n h �n g   c h �c   c h �n   n �   c h o   r �n g   �   l �   p h �n   c �a   v i  t r �  m �   c o n   n g ��i   k h � n g   t h �  q u a n   s � t   ��c .   
 
 
 
 M �   h � n h   c �a   P t o l e m y   �   t �o   r a   ��c   m �t   h �  t h �n g   t ��n g   �i   c h � n h   x � c   �  t i � n   o � n   v �  t r �   c �a   c � c   t h i � n   t h �  t r � n   b �u   t r �i .   N h �n g   �  t i � n   o � n   n h �n g   v �  t r �   �   m �t   c � c h   h o � n   t o � n   c h � n h   x � c ,   P t o l e m y   �   p h �i   �a   r a   g i �  t h u y �t   r �n g   m �t   t r n g   c h u y �n   �n g   t h e o   m �t   q u �  �o   � i   k h i   �a   n �   t �i   g �n   t r � i   �t   t �i   2   l �n   n h �  h �n   s o   v �i   �  n h �n g   t h �i   i �m   k h � c .   P t o l e m y   � n h   p h �i   c h �p   n h �n   i �m   y �u   � ,   n h �n g   d �u   s a o   v �  �i   t h �,   l �   c �   t h �  c h �p   n h �n   ��c .   M �   h � n h   n � y   �   ��c   n h �   t h �  T h i � n   c h � a   g i � o   c h u �n   y   n h �  m �t   b �c   t r a n h   v �  v i  t r �  p h �   h �p   v �i   K i n h   T h � n h ,   b �i   v �   n �   c �   m �t   �u   i �m   r �t   l �n   l �   �  d � n h   k h �   n h i �u   c h �  �  n g o � i   m �t   c �u   c u �i   c � n g   c �a   c � c   n g � i   s a o   c �  �n h   c h o   t h i � n   ��n g   v �   �a   n g �c .   
 
 
 
 T u y   n h i � n ,   m �t   m �   h � n h   �n   g i �n   h �n   �   ��c   m �t   m �c   s �  n g ��i   B a   L a n ,   t � n   l �   N i c h o l a s   C o p e r n i c u s   �  x u �t   v � o   n m   1 5 5 4 .   ( T h o �t   �u ,   c �   l �  v �   s �  n h �   t h �  q u y   l �   d �  g i � o ,   C o p e r n i c u s   �   c h o   l �u   h � n h   m �   h � n h   c �a   m � n h   n h �  m �t   t � c   p h �m   k h u y �t   d a n h ) .   �   t ��n g   c �a   � n g   l �   m �t   t r �i   �n g   y � n ,   c � n   t r � i   �t   v �   n h �n g   h � n h   t i n h   c h u y �n   �n g   t h e o   n h �n g   q u �  �o   t r � n   x u n g   q u a n h   m �t   t r �i .   P h �i   m �t   g �n   m �t   t h �  k �,   �   t ��n g   n � y   m �i   ��c   c h �p   n h �n   m �t   c � c h   t h �c   s �.   H a i   n h �   t h i � n   v n   -   m �t   n g ��i   �c   t � n   l �   J o h a n n e s   K e p l e r   v �   m �t   n g ��i   I t a l y   t � n   l �   G a l i l e o   G a l i l e i   -   �   b �t   �u   c � n g   k h a i   �n g   h �  h �c   t h u y �t   C o p e r n i c u s ,   m �c   d �   n h �n g   q u �  �o   m �   n �   t i � n   o � n   c h �a   n   k h �p   h o � n   t o � n   v �i   n h �n g   q u �  �o   q u a n   s � t   ��c .   V �   v � o   n m   1 6 0 9   m �t   � n   c h �   m �n g   �   g i � n g   x u �n g   h �c   t h u y �t   A r i s t o t l e   -   P t o l e m y .   V � o   n m   � ,   G a l i l e o   b �t   �u   q u a n   s � t   b �u   t r �i   b �n g   c h i �c   k � n h   t h i � n   v n   c �a   � n g   v �a   p h � t   m i n h   r a .   K h i   q u a n   s � t   s a o   M �c ,   G a l i l e o   t h �y   r �n g   k � m   t h e o   n �   c � n   c �   m �t   s �  v �  t i n h   h a y   n � i   c � c h   k h � c   l �   n h �n g   m �t   t r n g   q u a y   x u n g   q u a n h   n � .   i �u   n � y   n g �  �   r �n g   k h � n g   p h �i   m �i   t h i � n   h �   �u   n h �t   t h i �t   p h �i   t r �c   t i �p   q u a y   x u n g   q u a n h   t r � i   �t ,   n h �  A r i s t o t l e   v �   P t o l e m y   �   n g h ).   ( T �t   n h i � n   v �n   c �   t h �  t i n   r �n g   t r � i   �t   �n g   y � n   �  t r u n g   t � m   c �a   v i  t r �  v �   c � c   m �t   t r n g   c �a   s a o   M �c   c h u y �n   �n g   t h e o   n h �n g   q u �  �o   c �c   k �  p h �c   t �p   k h i �n   t a   c �   c �m   t ��n g   n h �  n �   q u a y   q u a n h   s a o   M �c .   T u y   n h i � n   h �c   t h u y �t   c �a   C o p e r n i c u s   �n   g i �n   h �n   n h i �u ) .   C � n g   t h �i   g i a n   � ,   K e p l e r   �   c �i   t i �n   h �c   t h u y �t   c �a   C o p e r n i c u s   b �n g   c � c h   �a   r a   g i �  t h u y �t   r �n g   c � c   h � n h   t i n h   k h � n g   c h u y �n   �n g   t h e o   ��n g   t r � n   m �   t h e o   ��n g   e l i p .   V �   n h �n g   t i � n   o � n   b �y   g i �  h o � n   t o � n   n   k h �p   v �i   q u a n   s � t .   
 
 
 
 �i   v �i   K e p l e r ,   c � c   q u �  �o   e l i p   �n   g i �n   c h �  l �   m �t   g i �  t h u y �t   t i �n   l �i   v �   c h � n h   t h �  n �   c � n g   k h �   c h �p   n h �n   b �i   v �   c � c   e l i p   r �   r � n g   l �   k � m   h o � n   t h i �n   h �n   c � c   v � n g   t r � n .   K h i   p h � t   h i �n   t h �y   g �n   n h �  m �t   c � c h   n g �u   n h i � n   r �n g   c � c   q u �  �o   e l i p   r �t   n   k h �p   v �i   q u a n   s � t ,   K e p l e r   k h � n g   s a o   d u n g   h � a   ��c   n �   v �i     
    
		
	
	
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