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��ȭ�� - �� 2�� ¾�� 

2-1. ��ʿ��
2-2. �� ȭ
2-3. ��
2-4. �¾�� Ư¡
2-5. �� ȭ
2-6. ��
2-7. ��
��

2-4. �¾�� Ư¡
�¾��(solar system)�� ¾�� ֺ�� ִ� �༺, ��Ȥ�� , �� ༺�� ֺ�� , �׸�� ̵� õü�� ̿� ��ϴ� �� Ī�ؼ� �θ�� ̴�. �¾�� 츮 �� ϳ�� , ��ֿ�� ̷�� ϰ� �� ٴ� �� ̹� �տ�� ̾߱��Ͽ��. �츮�� ¼�� ̷� �¾�迡 �� Ǿ�� , �츮�� ¾�迡 �� ä �� δ� �ճ�� ֿ� �� ̾߱� �ϸ� ��δ� �� ȳ�� η�� ̾߱� �Ϸ�.

[�׸�] �¾�� . �� ׸�� ¾�� ༺�� ũ�� ׸�� ̵� �� Ÿ�� ٸ�.
�¾�� ϱ� ��ؼ�� ¾�� �� Ư¡�� ִ�� ˾ƾ� �� ̴�. �¾�� ź�� ̷�� ־��, �� ̷е�� ¾�� Ư¡�� Ǹ��ϰ� ��ϴ� �� ̷�� ɼ�� ũ�� ̴�.
�¾�� Ư¡ �� ߿�� ͵� �� Ʒ�� :

�¾�� ¾�� ü �� 99.8%�� ϳ�, ��ü ���� 2%�� Ѵ�.
�� ༺�� ¾� �� Ÿ�� ˵�� ϸ�, �� ˵�� ִ�.
�༺�� ༺�� Ѵ� (��: õ�ռ�, �ݼ�).
�༺�� Bode ��Ģ(Bode's law)�� Ģ�� 迭�Ǿ� �� (�Ʒ� ǥ ��), Ư¡�� ༺�� з�� ִ�:
��༺ �Ǵ� �� ༺ (inner planet or terrestrial planet); ��, �ݼ�, ��, ȭ�� ༺ �Ǵ� ��༺ (outer planet or major planet); ��, �伺, õ�ռ�, �ؿռ�
�¾�� ü ���� κ�� ༺�� ̴�.

[ǥ] �¾�� ༺�� Ÿ�; Bode ��Ģ�� Ÿ�� Ÿ��
(�¾�� Ÿ�� 10�� ).

�༺ �� ݼ� �� ȭ�� ༺ �� 伺 õ�ռ� �ؿռ� ��ռ�

�� Ÿ� 3.9 7.2 10 15.2 27.7 52 95 192 301 395

Bode �Ÿ� 4+0=4 4+3=7 4+6=10 4+12=16 4+24=28 4+48=52 4+96=100 4+192=196 4+384=388

�¾�� ź�� ̷�� ǥ�� (neubla theory)�� ܷ¼�(external force theory)�̴�. ���� ĭƮ(Kant)�� ö�(Laplace) �� Ͽ��µ�, �� κ�� Ͽ� �¾�� ༺�� ٴ� ��̴�. �� �� �� ¾��, �׸�� ༺�� Ǿ��ٴ� ��̴�. �׷��, �� ¾�� Ư¡�� ù ��° �� ټ� ��°�� Ѵ�. �̷�� �� з� �� ܷ¼�� ޾Ҵ�. �ܷ¼�� (Buffon), è��(Chamberline), ��ư(Moulton)� �� ̷��, �� ¾翡 �ܺ� õü�� 浹�ϰų� ��鼭 �� Ϻθ� �� ༺�� ٴ� ��̴�. �׷��, �� ༺�� ̷�⺸�� ٴ� �� ȿ� �� ̻� �ָ� �� ϰ� �Ǿ��. �� Ŀ(Weizsa:cker), �ش��(Anders), ��(Owen)�� �� µ�, �̷�� �� Ұ��ϸ� �� .
�¾�� ź�� κ�� ۵Ǿ��. �� ü ��(��)�� Ǿ��. �� ϸ鼭 �� µ�� ϰ� �Ǿ��, �׿� �� Ϻ� �� ȭ�Ǹ� �ܰ�� Ǿ��. �� ϰ� �ִ� ��鵵 �Ϻ� �ܺη� �� , �߽ɺο�� (��ü) �� ڸ�� Ǿ��. �� ӵ� �� µ�� Ű�� ¾�� . �� ¾�� ؼ� �� κ� �� ȿ� �� ־��µ�, �� ¾�� µ� �� ⿩�Ͽ��. ��, �� ¾� �ֺ�� ü �� ܺ�� ༺ �� ༺�� ʱ� �� Ͽ��µ�, �̸� "planetesimal"�̶� �θ��. �� planetesimal�� ֺ� �� ĥ�� Ű��. �� ¾�� µ�� Ͽ��, �� 缺�ڿ� �� �� ¾�ǳ ��·� �߻�Ǿ��(T-Tauri stage). �� ¾�ǳ�� ִ� �ֹ߼� �� Ȱ�, ũ�Ⱑ �� planetesimal�� Ҹ��ѹ��ȴ�. �� , �¾�� 츮�� ִ� �Ͱ� �� Ͽ��, planetesimal�κ�� ༺�� Ͽ� �� Ŵ�� ¾� �� ϰ� ��ϰ� �Ǿ��.

[ǥ] �¾�� ༺�� .

�̸� �¾� �� ݼ� �� ȭ�� ༺ �� 伺 õ�ռ� �ؿռ� ��ռ�

�Ÿ�(�鸸km) - 57.9 108.2 149.6 227.9 414.0 778.3 1427.0 2869.6 4504 5900

��(õkm) 1391.4 4.878 12.1 12.756 6.786 1.02 142.984 120.536 51.118 49.562 3.0

��(g) 1.987
*10³³ 3.3
*10²⁶ 4.87
*10²⁷ 5.98
*10²⁷ 6.44
*10²⁶ 1.17
*10²⁴ 1.9
*10³⁰ 5.69
*10²⁹ 8.66
*10²⁸ 1.01
*10²⁹ 1.5
*10²⁵

�е�(g/cm³) 1.4 5.44 5.25 5.52 3.94 2.2 1.33 0.7 1.3 1.76 1.1

�� - 0 0 1 2 - 16 21 15 8 1

2-5. �� ȭ��

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