Post by tannum on Aug 27, 2007 17:57:00 GMT 7
notear said:
ª×èÍ Genvive NotearºéÒ¹ àÃàǹ¤ÅÍ
ª×èÍàÃ×èͧ ÈѾ·ì´ÒÃÒÈÒʵÃìàÅèÁ 3
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C Star (Carbon Star) ÁÕ spectral Type C à»ç¹´ÒÇÂÑ¡Éìá´§àÂç¹à©Õº ¼ÔǢͧ´ÒÇÁÕͧ¤ì»ÃСͺ¢Í§¤ÒÃìºÍ¹à»ç¹âÁàÅ¡Øž×é¹°Ò¹ àªè¹ ¤ÒÃìºÍ¹Á͹¹êͤ䫴ì (CO) ä«ÂÒâ¹à¨¹ (CN) áÅÐâÁàÅ¡ØŢͧ¤ÒÃìºÍ¹ (C2) ´ÒÇÄ¡ÉìÁÇÅ¢¹Ò´´Ç§ÍÒ·ÔµÂì¢Í§àÃÒªèǧ·Õèà»ç¹´ÒÇÂÑ¡Éìá´§ ¨ÐÁÕ¤ÒÃìºÍ¹à»ç¹Êèǹ»ÃСͺàªè¹¡Ñ¹ à¹×èͧ¨Ò¡»¯Ô¡ÔÃÔÂÒ¹ÔÇà¤ÅÕÂÃì·Õè᡹¡ÅÒ§·Õè¼ÅÔµ¤ÒÃìºÍ¹áÅéÇÊ觵èͶ֧¾×é¹¼ÔÇ
Calendar (á¤Å àÍç¹à´ÍÐ) »¯Ô·Ô¹ ¤×ÍÇѹ㹠1»Õ·Õè¶Ù¡áºè§ÂèÍÂÍÍ¡à»ç¹à´×Í¹æ µÒÁ¡ÒûÃÒ¡¯¢Í§´Ç§ÍÒ·ÔµÂìËÃ×ʹǧ¨Ñ¹·Ãì »¯Ô·Ô¹¶Ù¡¤Ô´¢Öé¹ ¤ÃÑé§ááâ´Â ªÒǺҺÔâÅà¹Õ¹ â´Âãªé¡ÒûÃÒ¡¯¢Í§´Ç§¨Ñ¹·Ãì«Öè§ÁÕ 29.5 Çѹ àÃÕ¡ÇèÒ "»¯Ô·Ô¹¨Ñ¹·Ã¤µÔ" áµèÁÒ¶Ù¡»ÃѺ»ÃاãËéÁÕ¤ÇÒÁáÁè¹ÂÓ¢Öé¹ â´ÂªÒÇÍÕÂÔ»µìâºÃÒ³ â´Âãªé´Ç§ÍÒ·ÔµÂìà»ç¹ËÅÑ¡ àÃÕ¡ÇèÒ "»¯Ô·Ô¹ÊØÃÔÂФµÔ"
Cassegrain Telescope (á¤Ê-«Ô-à¡Ã¹) à»ç¹¡ÅéͧÊзé͹áʧÍÕ¡ª¹Ô´Ë¹Ö觷ÕèÁÕ¡ÃШ¡ËÅÑ¡à»ç¹áºº¾ÒÃÒâºÅÔ¤ Êзé͹ÀÒ¾¡ÅѺä»Âѧ¡ÃШ¡ºÒ¹·ÕèÊͧ (secondary mirror) ·Õèà»ç¹¡ÃШ¡¹Ù¹ áÅÐÊзé͹¼èÒ¹Ãٵç¡ÅÒ§¡ÃШ¡ËÅÑ¡ à¡Ô´¨Ø´â¿¡ÑÊ·ÕèàÃÕ¡ÇèÒ "Cassegrain Focus" ¡ÅéͧẺ Cassegrain ¹Õé¶Ù¡¤Ô´¢Ö鹤ÃÑé§ááâ´Â¹Ñ¡ºÇªªÒǽÃÑè§àÈʪ×èÍ Laurent Cassegrain àÁ×èͻդÈ.1629-1693 ´Ù¤ÓÇèÒ Schmidt-Cassegrain Telescope
Cassini Division (á¤Ê-«Ô-¹Õè ´ÔÇÔªÑè¹) à»ç¹ªèͧÇèÒ§ÃÐËÇèҧǧáËǹ A áÅÐ B ¢Í§´ÒÇàÊÒÃì ¶Ù¡¤é¹¾º¤ÃÑé§ááâ´Â ¹Ñ¡´ÒÃÒÈÒʵÃìªÒǽÃÑè§àÈʪ×èÍ Giovanni Cassini àÁ×èÍ»Õ ¤È.1675 áµèµèÍÁÒÂÒ¹ÇÍÂàÍà¨ÍÃ쾺ÇèÒäÁèä´éà»ç¹ªèͧÇèÒ§á·é¨ÃÔ§ áµè»ÃСͺ´éÇÂǧáËǹàÅç¡æÍÕ¡¹ÑºÃéÍÂǧ
Cassini Spacecraft à»ç¹ÂÒ¹ÍÇ¡ÒÈÊÓÃǨ´ÒÇàÊÒÃìáÅкÃÔÇÒÃ䷷ѹ à»ç¹¤ÇÒÁÃèÇÁÁ×͡ѹÃÐËÇèҧͧ¤ì¡ÒùҫèÒ(NASA) ¡ÑºÍ§¤ì¡ÒÃÍÇ¡ÒÈÂØâû (ESA) »ÅèÍÂÊÙèǧ⤨ÃàÁ×èÍà´×͹µØÅÒ¤Á 1997 ÂÒ¹á¤Ê«Ô¹Õè¨Ð⤨ÃÃͺ´ÒÇàÊÒÃìáÅлÅèÍÂËÑÇÊÓÃǨª×èÍ Huygens ÊÓÃǨ´Ç§¨Ñ¹·Ãì䷷ѹ áÅШÐàÊÃç¨ÊÔé¹ÀÒÃСԨ»Õ ¤È.2004
Cassiopeia A (á¤Ê-«-ÔâÍ-à»ÕÂ- àÍ) áËÅ觤Å×è¹ÇÔ·ÂؤÇÒÁà¢éÁÊÙ§º¹·éͧ¿éÒ㹡ÅØèÁ´ÒÇá¤Ê«ÔâÍà»Õ à»ç¹«Ò¡ËŧàËÅ×ͨҡ¡ÒÃÃÐàºÔ´¢Í§«Ø»à»ÍÃìâ¹ÇÒ àÁ×èÍÃÒÇ ¤È.1660 áµèäÁèÁÕ¡Òúѹ·Ö¡¡ÒÃàËç¹äÇ麹âÅ¡ ·Ô駫ҡäÇéà»ç¹à¹ºÔÇÅèÒ¨Ò§æ ÍÂÙèËèÒ§¨Ò¡âÅ¡ÃÒÇ 10,000 »Õáʧ
Catadioptric (¤Ò-·Ò-ä´-ÍêÍ»-µÃÔ¡) à»ç¹¡Åéͧâ·Ã·ÃÃȹìÍÕ¡ª¹Ô´Ë¹Ö觷ÕèÃÇÁàÍÒËÅÑ¡¡ÒâͧàŹ«ìáÅСÃШ¡äÇé´éÇ¡ѹ â´ÂÁÕàŹ«ìÃÇÁáʧÍÂÙè´éҹ˹éÒ·ÕèàÃÕ¡ÇèÒ Correcting plated ÁÕ¡ÃШ¡¹Ù¹µÔ´äÇéÍÕ¡´éҹ˹Öè§à¾×èÍÊзé͹ÀÒ¾¨Ò¡¡ÃШ¡ËÅÑ¡ ¼èÒ¹Ãٵç¡Åҧ价éÒ¡ÃШ¡ ¤ÅéÒ¡Ѻ¡Åéͧ Cassegrain à¾Õ§á¤èÁÕ Correcting plated à¾ÔèÁ´éҹ˹éÒà·èÒ¹Ñé¹ ¡ÅéͧẺ¹Õéä´éá¡è Schmidt-Cassegrain telescope áÅÐ Maksutov Telescope
CCD (charge-coupled device) à»ç¹ÊÒáÖ觵ÑÇ¹Ó (solid-state) ·Ò§ÍÔàŤ·Ã͹Ԥ·Õè·ÓãËéà¡Ô´ÀÒ¾ä´é CCD ¨Ð»ÃСͺ´éÇ¢ÑéÇä¿¿éÒ¢¹Ò´ÊÕèàËÅÕèÂÁàÅç¡àÃÕ§µè͡ѹà»ç¹á¼§ÊÕèàËÅÕèÂÁ¢¹Ò´ãËè àÁ×èÍáʧµ¡¡Ãзº¢ÑéÇä¿¿éÒáµèÅТÑéÇ¡ç¨Ðà»ÅÕè¹¾Åѧ§Ò¹áʧà»ç¹ä¿¿éÒ ¼èÒ¹¢ºÇ¹¡ÒÃà¾×èÍ·ÓãËéà¡Ô´à»ç¹ÀÒ¾ä´é ¤ÇÒÁÅÐàÍÕ´¢Í§ÀÒ¾¢Öé¹ÍÂÙè¡Ñº¨Ó¹Ç¹¢ÑéÇä¿¿éÒ¹Ñé¹ÁÕ˹èÇÂà»ç¹ ¾Ô¡à«Å ¡ÅéͧÇÕ´ÔâÍ·ÑèÇ仨ÐÁÕ CCD à»ç¹Êèǹ»ÃСͺ áµè»Ñ¨¨ØºÑ¹Ç§¡ÒôÒÃÒÈÒʵÃìãªé CCD à¾×èÍ¡ÒöèÒÂÀҾ᷹¿ÔÅìÁ«Ö觨зÓãËéªèǧàÇÅÒ¡ÒöèÒÂÀÒ¾¹Ñé¹Å´Å§
Celestial Equator («Õ-àÅÊ-àªÕ¹- ÍÔ-à¤Ç-àµÍÃì) à»ç¹á¹Ç¢Í§àÊé¹ÈÙ¹ÂìÊÙµÃâÅ¡ ·Õè¢ÂÒÂä»»ÃÒ¡¯º¹·Ã§¡ÅÁ·éͧ¿éÒ àÃÕ¡ÇèÒ àÊé¹ÈÙ¹ÂìÊٵ÷éͧ¿éÒ ´Ñ§¹Ñé¹á¹Ç¢Í§àÊé¹ÈÙ¹ÂìÊÙµÃâÅ¡ ¡Ñº á¹ÇàÊé¹ÈÙ¹ÂìÊٵ÷éͧ¿éÒ ¨Ðà»ç¹á¹Çà´ÕÂǡѹ
Celestial Object («Õ-àÅÊ-àªÕ¹ ÍÍ»à¨ç¤·ì) ãªéàÃÕ¡Çѵ¶Ø·ÕèÍÂÙ躹·Ã§¡ÅÁ·éͧ¿éÒ àªè¹ ´ÒÇÄ¡Éì ´ÒÇà¤ÃÒÐËì ´Ç§¨Ñ¹·Ãì ´ÒÇËÒ§ áÅÐÍ×è¹æ ÃÇÁ·Ñ駴ǧÍÒ·ÔµÂì
Celestial sphere («Õ-àÅÊ-àªÕ¹-Êà¿ÕÂÃ) ·Ã§¡ÅÁÊÁÁصԢͧ·éͧ¿éÒ·ÕèÅéÍÁÃͺâÅ¡àÃÒäÇé â´ÂÁÕâÅ¡ÍÂÙè·Õè¨Ø´ÈÙ¹Âì¡ÅÒ§áÅÐÁÕÃÑÈÁÕà»ç¹Í¹Ñµµì ËÁعÃͺâÅ¡´éÇÂ᡹·Õè¨Ø´¢ÑéÇ¿éÒ·ÕèàÃÕ¡ÇèÒ Celestial Pole â´ÂÁÕàÊé¹ÈÙ¹ÂìÊٵ÷éͧ¿éÒ (celestial equator) ¢¹Ò¹ä»¡ÑºàÊé¹ÈÙ¹ÂìÊÙµÃâÅ¡´éÇ ´Ùº·¤ÇÒÁ»ÃСͺ
Celestial mechanics («Õ-àÅÊ-àªÕ¹-áÁ¤-¤Ò-¹Ô¤) ÊÒ¢Ò˹Ö觢ͧÇÔªÒ´ÒÃÒÈÒʵÃì ·Õè͸ԺÒ¶֧¡ÒÃà¤Å×è͹·Õè¢Í§Çѵ¶Øº¹·éͧ¿éÒ â´Âãªé¡¯ ·Ò§¿ÔÊÔ¡Êì ͸ԺÒÂá¹Ç¡ÒÃ⤨âͧ´ÒÇà¤ÃÒÐËì ´ÒÇà·ÕÂÁ áÅÐÍ×è¹æ
Centaurus A (ૹ·ÍÃÑÊ àÍ) ËÃ×Í¡ÒáÅ¡«Õè NGC5128 à»ç¹¡ÒáÅ¡«ÕèáËÅ觤Å×è¹ÇÔ·ÂØ·Õèà¢éÁ¢é¹ÁÒ¡ ¤Ò´ÇèÒà¡Ô´¨Ò¡¡Ò깡ѹ¢Í§¡ÒáÅ¡«ÕèÂÑ¡ÉìÃÙ»ä¢è ¡Ñº¡ÒáÅ¡«Õèà¡ÅÕÂÇ¢¹Ò´àÅç¡ àÁ×èÍÁͧ´éÇ¡Åéͧâ·Ã·ÃÃȹì¨ÐàËç¹á¶º½Øè¹·Öº¾Ò´¡ÅÒ§¡ÒáÅ¡«ÕèÊͧᶺ Centaurus A ÍÂÙèËèÒ§¨Ò¡âÅ¡ 10 ÅéÒ¹»Õáʧ 㹡ÅØèÁ´ÒÇÁéÒ¤ÃÖ觤¹ (Centaurus)
Chandrasekar Limit ¤èÒ¨Ó¡Ñ´¨Ñ¹·ÃÒÊÔ¡¢Ò à»ç¹¤èÒÊÙ§ÊØ´¢Í§ÁÇŢͧ´ÒÇá¤ÃТÒÇ (White dwart) ÁÕ¤èÒ»ÃÐÁÒ³ 1.4 à·èҢͧ´Ç§ÍÒ·ÔµÂì ¶éÒ´ÒÇÄ¡ÉìÁÕÁÇÅÁÒ¡¡ÇèÒ¤èÒ¹Õé ´ÒǨÐÂغµÑÇ¡ÅÒÂà»ç¹´ÒǹÔǵÃ͹ áÅÐËÅØÁ´Ó ¤èÒ¨Ó¡Ñ´¨Ñ¹·ÃÒÊÔ¡¢Ò¶Ù¡¤Ô´¢Ö鹤ÃÑé§ááàÁ×èÍ»Õ ¤È.1931 â´Â¹Ñ¡´ÒÃÒÈÒʵÃì¿ÔÊÔ¡ÊìªÒÇÍàÁÃԡѹàª×éÍÊÒÂÍÔ¹à´Õ áÅÐà¢Òä´éµÑ駷ÄɯÕà¡ÕèÂǡѺÇÔÇѲ¹Ò¡Òâͧ´ÒÇÄ¡Éì
Chandra X-ray Observatory (CXO) ËÍÊѧࡵ¡Òóì¨Ñ¹·ÃÒàÍç¡«àÃÂì à»ç¹´ÒÇà·ÕÂÁ¢Í§¹Ò«èÒ ¶Ù¡Ê觢Öé¹ÊÙèǧ⤨ÃàÁ×èͻդÈ.1999 à»ç¹´ÒÇà·ÕÂÁÊÓÃǨ·éͧ¿éÒªèǧ¤Å×è¹ÃѧÊÕàÍç¡«ì ¶Ù¡µÑ駪×èÍãËéà»ç¹à¡ÕÂõԡѺ Subrahmanyan Chandrasekhar ¹Ñ¡´ÒÃÒÈÒʵÃì¿ÔÊÔ¡ÊìªÒÇÍàÁÃԡѹàª×éÍÊÒÂÍÔ¹à´ÕÂ
Chromosphere (â¤Ã-âÁÊ-à¿ÕÂÃì) ªÑ鹺ÃÃÂÒ¡ÒȢͧ´Ç§ÍÒ·ÔµÂìÍÂÙèÃÐËÇèÒ§ªÑé¹ Photoshere ¡Ñº Corona ÁÕ¤ÇÒÁ˹һÃÐÁÒ³ 10,000 ¡ÔâÅàÁµÃ ÍسËÀÙÁÔ 4,000 ¶Ö§ 100,000 à¤ÅÇÔ¹
Coma (â¤ÁèÒ) ÁÕ 2 ¤ÇÒÁËÁÒ¤×Í
1) à»ç¹¤ÇÒÁ¼Ô´à¾Õ鹢ͧÀÒ¾·Õ赡¡Ãзºº¹àŹ«ì ÁͧàËç¹Çѵ¶Øà»ç¹½éÒÃÕæ ¤ÅéÒ¡ѺËÑǢͧ´ÒÇËÒ§ ÊÒà˵Øà¡Ô´¢Ö鹨ҡÁØÁµ¡¡Ãзº¢Í§ÀÒ¾ ¡ÑºàŹ«ìÇѵ¶Ø áÅШмԴà¾Õé¹ÁÒ¡¢Öé¹àÁ×èÍÍÂÙèËèÒ§ÈÙ¹Âì¡ÅÒ§ ¢Í§ÁØÁÁͧ¢Í§ÀÒ¾ÁÒ¡¢Öé¹àªè¹¡Ñ¹
2) à»ç¹¡ÅØèÁ¡êÒ«ËÃ×ͽØè¹ÅÐÍͧ·ÕèÍÂÙèÃͺæ ᡹¡ÅÒ§¢Í§´ÒÇËÒ§
Conjunction (¤Í¹-¨Ñ§-ªÑè¹) ËÃ×͵Óá˹è§ÃèÇÁ ´ÙàÃ×èͧ Elongation
Constellation (¤Í¹-ÊàµÅ-àÅ-ªÑè¹) ËÃ×Í¡ÅØèÁ´ÒǺ¹·éͧ¿éÒ à»ç¹¡ÅØèÁ¢Í§´ÒÇÄ¡É캹·éͧ¿éÒ·ÕèÁ¹ØÉÂì¨Ôµ¹Ò¡ÒÃäÇéà»ç¹ÃÙ»ÃèÒ§µèÒ§æà¾×èͧèÒµèÍ¡Òè´¨Ó àÃÔèÁãªé¤ÃÑé§ááã¹ÂؤÊÁÑ¢ͧ Ptolemy ÁÕÍÂÙè´éÇ¡ѹ 44 ¡ÅØèÁ »Ñ¨¨ØºÑ¹ IAU áºè§¡ÅØèÁ´ÒǺ¹·éͧ¿éÒÍÍ¡à»ç¹ 88 ¡ÅØèÁ áÅСÓ˹´¢Íºà¢µ·Õèá¹è¹Í¹àÁ×èÍ»Õ ¤È.1930 ¨Ò¡¡ÅØèÁ´ÒÇ¢¹Ò´àÅç¡ÊØ´¤×Í¡ÅØèÁ´Òǡҧࢹãµé (Crux) ¨¹¶Ö§¡ÅØèÁ´ÒÇ·ÕèÁÕ¢¹Ò´ãËè·ÕèÊØ´¤×Í¡ÅØèÁ´ÒǧÙäδÃÒ (Hydra)
Coordinates (â¤-ÍÍ-´Ô-๷) ËÃ×ÍÃкº¾Ô¡Ñ´ à»ç¹Ãкº·ÕèãªéÊÓËÃѺÍéÒ§ÍÔ§µÓá˹觢ͧÇѵ¶Ø·éͧ¿éÒ ã¹·Ò§´ÒÃÒÈÒʵÃì¹ÔÂÁãªé¡Ñ¹ÍÂÙèÊͧẺ¤×Í
1.Ãкº¢Íº¿éÒ (The Horizontal system) ËÃ×Í ºÒ§·ÕàÃÕ¡ÇèÒÃкºÍÑŵԨٴáÅÐÍЫÔÁØ· (Altitude and Azimuth system)
ÍÑŵԨٴ (Altitude) ËÃ×Í ÁØÁà§Â à»ç¹ÁØÁ·ÕèÇÑ´¨Ò¡àÊ鹢ͺ¿éÒ ¤×Í 0 ͧÈÒ ¢Õé¹ä»¨¹¶Ö§¨Ø´à˹×ÍÈÕÃÉÐ Zenith ¤×Í 90 ͧÈÒ
ÍЫÔÁØ· (Azimuth) à»ç¹·ÔÈ·Ò§µÒÁá¹ÇàÊ鹢ͺ¿éÒ Horizontal Line àÃÔèÁµé¹¨Ò¡·ÔÈà˹×Í 0 ͧÈÒ ä»µÒÁá¹Ç·ÔÈ µÐÇѹÍÍ¡ ·ÔÈãµé ·ÔȵÐÇѹµ¡ ¡ÅѺÁÒ·Õè·ÔÈà˹×Í ¤ÃºÃͺ 360 ͧÈÒ
¡Òú͡µÓá˹觴éÇÂÇÔ¸Õ¹Õé ¨ÐºÍ¡à»ç¹¤èÒÁØÁà§Â áÅÐ ÁØÁÍЫÔÁØ· ¾ÃéÍÁ¡Ñ¹ ÁÕ˹èÇÂà»ç¹Í§ÈÒ áÅСÒú͡µÓá˹è§Ãкº¹Õé ¨Ðãªéä´é¡Ñº¼ÙéÊѧࡵطÕèÍÂÙ躹àÊé¹ÅеԨٴà´ÕÂǡѹ ã¹àÇÅÒà´ÕÂǡѹ ( Åͧ¨Ô¨Ù´à´ÕÂǡѹ) à·èÒ¹Ñé¹ àªè¹¢³Ð¹Õé´ÒÇËÒ§ÍÂÙè·ÕèµÓáË¹è§ ÁØÁÍÑŵԨٴ 45 ͧÈÒ ÁØÁÍЫÔÁØ· 270 ͧÈÒ à»ç¹µé¹
2. ÃкºÈÙ¹ÂìÊٵà (Equatorial System) à»ç¹Ãкº·Õè¨ÓÅͧÁÒ¨Ò¡¡Òú͡µÓá˹觺¹¾×é¹âÅ¡´éÇÂàÊé¹ ÅеԨٴ áÅÐ Åͧ¨Ô¨Ù´ â´Â·Õ躹·éͧ¿éÒàÃҨк͡µÓá˹è§à»ç¹¤èÒ à´¤ÅÔ๪Ñè¹ (Declination- Dec) áÅÐ ä÷ìáÍÊૹªÑè¹ (Right Ascension- R.A)
à´¤ÅÔ๪Ñè¹ (Declination- Dec) à»ÃÕºä´é¡ÑºÅеԨٴ ÁÕ˹èÇÂà»ç¹Í§ÈÒ ãªéºÍ¡ÃÐÂÐàªÔ§ÁØÁ¢Í§´ÒÇÇèÒÍÂÙèËèÒ§¨Ò¡ àÊé¹ÈÙ¹ÂìÊٵÿéÒ ( 0 ͧÈÒ) ä»·Ò§·ÔÈà˹×Í ÃÐËÇèÒ§ 0 ¶Ö§ +90 ͧÈÒ ËÃ×Í ä»·Ò§·ÔÈãµé ÃÐËÇèÒ§ 0 ¶Ö§ –90 ͧÈÒ à»ç¹ÁØÁà·èÒã´
ä÷ìáÍÊૹªÑè¹ (Right Ascension- R.A) à»ÃÕºä´é¡Ñº Åͧ¨Ô¨Ù´ ·ÕèºÍ¡Ë¹èÇÂà»ç¹ àÇÅÒ ªÑèÇâÁ§:¹Ò·Õ:ÇÔ¹Ò·Õ â´Â·Õè 360 ͧÈÒÁÕ¤èÒà·èҡѺ 24 ªÑèÇâÁ§ ËÃ×Í 15 ͧÈÒ ÁÕ¤èÒà·èҡѺ 1 ªÑèÇâÁ§ 㹷ӹͧà´ÕÂǡѹ¡ÑºàÊé¹Åͧ¨Ô¨Ù´ ¨Ø´àÃÔèÁµé¹ 0 ͧÈÒËÃ×Í 0 ªÑèÇâÁ§ ÍÂÙè·ÕèàÁ×ͧ¡ÃÕ¹Ôª ã¹»ÃÐà·ÈÍѧ¡ÄÉ ÊÓËÃѺ R.A ¤èÒ 0 ͧÈÒËÃ×Í 0 ªÑèÇâÁ§¨ÐàÃÔèÁ·Õè¨Ø´ÍéÒ§ÍÔ§ Vernal Equinox (àÇÍÃì¹ÑÅ ÍÔ¤ÇԹͤ) ¤×ͨش·Õèá¹ÇàÊé¹Ecliptic µÑ´¡ÑºàÊé¹ÈÙ¹ÂìÊٵÿéÒ ¾Í´Õ ã¹Çѹ·Õè 21 ÁÕ¹Ò¤Á «Öè§à»ç¹Çѹ·Õè¡ÅÒ§Çѹ¡Ñº¡ÅÒ§¤×¹ÂÒÇà·èҡѹ µÃ§µÓá˹觡ÅØèÁ´ÒÇ»ÅÒ (PISCES) áÅéǹѺ价ҧ¢ÇÒÁ×Í (Right) à»ç¹ªÑèÇâÁ§ ¹Ò·Õ ÇÔ¹Ò·Õ ËÃ×ͶéÒàÃÒËѹ˹éÒ à¢éÒËÒ·ÔÈà˹×ÍãËé¹Ñºä»·Ò§·ÔȵÐÇѹÍÍ¡ áµèà¹×èͧ¨Ò¡¡ÅØèÁ´ÒÇ»ÅÒ äÁè¤èÍÂÊÇèÒ§º¹·éͧ¿éÒ¨Ö§ÊѧࡵÅÓºÒ¡ àÃÒÍÒ¨¨ÐãËé¡ÅØèÁ´ÒǤéÒ§¤ÒÇËÒµÓá˹觷Õè RA à·èҡѺÈÙ¹Âìä´éàªè¹¡Ñ¹
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