åœç«å€©æå°ãªã©ïŒïŒæ©é¢ã®åœéç 究ããŒã ã¯ïŒïŒæ¥ãé河系ïŒå€©ã®å·éæ²³ïŒã®äžå¿ã«äœçœ®ãã巚倧ãã©ãã¯ããŒã«ã®æ®åœ±ã«æåãããšçºè¡šããããããŸã§é河系äžå¿éšã®ãã©ãã¯ããŒã«ã®ååšã«ã€ããŠéæ¥çãªèšŒæ ã¯ãã£ãããçŽæ¥æ®åœ±ã¯åããŠã
ããã©ãã¯ããŒã«ã¯éåã極ããŠåŒ·ããå ã§ããã®ã¿èŸŒãã§ããŸããããŒã ã¯ïŒïŒïŒïŒå¹Žãå°çããçŽïŒäžïŒïŒïŒïŒå 幎ïŒïŒå 幎ã¯å ãïŒå¹Žã«é²ãè·é¢ïŒé¢ããé河系äžå¿éšã®ãã©ãã¯ããŒã«ãããŠåº§ïŒ¡ã¹ã¿ãŒãããåç±³ããªã®ãïŒïŒ¡ã¢ã«ãããªã©äžçïŒãæã®é»æ³¢æé é¡ã§èŠ³æž¬ãåšå²ã®ã¬ã¹ãªã©ããåºãé»æ³¢ã解æããé»ãç©Žãæµ®ãã³äžãããããç©Žã®äžå¿éšã«ãããã©ãã¯ããŒã«ã®è³ªéã¯å€ªéœã®çŽïŒïŒïŒäžåã«äžãã
ãããŒã ã¯ïŒïŒå¹ŽãçŽïŒïŒïŒïŒäžå 幎é¢ããéæ²³ãïŒïŒïŒãã®ãã©ãã¯ããŒã«æ®åœ±ã«æåããŠãããä»åãïŒäŸç®ãé河系äžå¿éšã§ã¯ã¬ã¹ã®åããïŒïŒïŒã«æ¯ã¹ãŠæ¿ãããç»ååã«æéãããã£ããšãããä»åŸãé河系ã®æãç«ã¡ã®è§£æã«ã€ãªããå¯èœæ§ãããã
ããã©ãã¯ããŒã«ã¯éåã極ããŠåŒ·ããå ã§ããã®ã¿èŸŒãã§ããŸããããŒã ã¯ïŒïŒïŒïŒå¹Žãå°çããçŽïŒäžïŒïŒïŒïŒå 幎ïŒïŒå 幎ã¯å ãïŒå¹Žã«é²ãè·é¢ïŒé¢ããé河系äžå¿éšã®ãã©ãã¯ããŒã«ãããŠåº§ïŒ¡ã¹ã¿ãŒãããåç±³ããªã®ãïŒïŒ¡ã¢ã«ãããªã©äžçïŒãæã®é»æ³¢æé é¡ã§èŠ³æž¬ãåšå²ã®ã¬ã¹ãªã©ããåºãé»æ³¢ã解æããé»ãç©Žãæµ®ãã³äžãããããç©Žã®äžå¿éšã«ãããã©ãã¯ããŒã«ã®è³ªéã¯å€ªéœã®çŽïŒïŒïŒäžåã«äžãã
ãããŒã ã¯ïŒïŒå¹ŽãçŽïŒïŒïŒïŒäžå 幎é¢ããéæ²³ãïŒïŒïŒãã®ãã©ãã¯ããŒã«æ®åœ±ã«æåããŠãããä»åãïŒäŸç®ãé河系äžå¿éšã§ã¯ã¬ã¹ã®åããïŒïŒïŒã«æ¯ã¹ãŠæ¿ãããç»ååã«æéãããã£ããšãããä»åŸãé河系ã®æãç«ã¡ã®è§£æã«ã€ãªããå¯èœæ§ãããã