ҳٌ֡ ൌ ç ʹҧҹŌ ѡʵÏҵչ䴌
¡ҧNj Ҵ Homer ա 䴌ѹ֡njNj ҧѻ ä
Ì ؾԡ ¹ ʧًªҵ ҧԴdžҡ⤨ͧ
ҧҹŌš з ˌԹҡͧšÌ ˌἋԹ Դ䴌
ѡѵʵÏ䴌ѹ֡١ѹNjҧҧ Ѻ˵óÌçѵÏnjҡ
ઋ㹻 .. 609 ͧѾѹءࢌ 䴌ҧҡ 㹻 .. 1999 ͧ
ѾáաѧŌا ô 䴌ҧҡաઋѹ ˵ó䴌 ˌͧ
ͧѾ ѹлһ Calixtus 3 çͧ͡Ǵ͌ˌŧ
ѧٌѹʧ 㹻 .. 2237 E. Halley 䴌 ˌٌԵ ŋNj ҧ
͡؋š
ᵋԷʵÏԭ˹Ң ࢌҵͧҧҡ ѹٌNj
ҧ ͺ¹ Թ ҧ⤨ࢌŌǧҷԵ ÌҡǧҷԵ
ˌ Ҩ ᡍ н؆ͧҡԹ؋ѴШ ʋǹͧҧ
؆١ѧʧҷԵѡʋǹᡍ ١з ˌʡá ҧ
Otto Quericke ¡ˋͧ Magdeburg ٌحҡԧNjҡ
ѹ 䴌ʹԴ㹻 .. 2193 Nj ҧҧ ժǧ ҡˌ ѹ⤨
Ѻˌٌ㹪ǧṋ ѡʵÏŋ Դŋͧҧ
Oort ً͡ǧ⤨ͧ ؋ًͧҧҳŌҹŌҹǧ
ˏҴ˭⤨üҹŌ Oort ç֧ٴͧˏ
з ˌҧش͡ҡ؋
Oort ؋ࢌ¨ѡˌš ʹյ ÷ӹͧҧͧ
÷䴌 з֧ͧ Newton Newton 䴌ç֧ٴNjҧ ٌ䴌ѡ ˌ
Halley ҴԴNj ҧѡ