水瓶座又稱寶瓶座，是黃道十二宮的第十一個星座，位於魔羯座和雙魚座之間，北鄰飛馬座，南邊則是南魚座，在天球赤道至赤緯 -20 度之間，太陽於每年的二月十六日至三月十一日通過此星座。在星圖中，水瓶座是美少年 Ganymede 的化身，他手上拿著水瓶，瓶裏裝著天神喜愛的美酒，酒水從倒著瓶口往南流，流至下方南魚的嘴中。(如右圖)
現在來介紹水瓶座的星星！在秋天的星空中，水瓶座並不明亮，整個星座中沒有明亮的一等及二等星， 其最著名的特徵是由四顆星所組成的「Ｙ」字型，由水瓶的 g、z、h 與 p 星構成，四顆星雖不明亮，但在亮星不多的秋夜中，亦頗易引人注目，為傳說中的「水瓶」。而水瓶座最亮的星是其 b 星 Sadalsuud (阿拉伯語中意思是「Luckiest of the lucky」)，亮度 2.9，呈黃色，是提水少年 Ganymede 的左肩。而右肩則是 a 星 Sadalmelik (阿拉伯語中意為「Lucky stars of the knig」)，亮度 3.0，亦呈黃色。第三亮星則構成右腳的 d 星 Scheat，亮度 3.3。
水瓶座雖無亮星，但卻有好幾個著名的星雲。其中 N.G.C. 7293 及N.G.C.7009 屬環狀星雲。 N.G.C.7293 稱為 Helix，在水瓶 u 星側，是環狀星雲中最大的，足足有半個月亮大，亦是最靠近太陽系的環狀星雲，但由於面積太大過於分散導至不甚明亮，須用高陪望遠鏡才易觀測得到。而 N.G.C.7009 稱為 Saturn Nebula，它比 Helix 更小，更不容易觀測。另外亦有兩個球狀星團，其一是 M2 星團，他是天空中幾個明亮的星團之一，在水瓶 b 星的北方，天候狀況極佳時以肉眼亦可見到，它有一圓型、雲狀的光暈，相當的明亮，直徑約4.8"，距地球有四萬光年遠。另一個較暗的是 M72 星團，在水瓶 e 星的南方，由於較暗所以不是很容易追蹤到。
- 1 0 年前最佳解答
The Aquarius, the 11th sign of the Zodiac, lies between the Scorpio and the Pisces, with its north to the Pegasus and south to the Piscis Austrinus. Within 20 degrees below the celestial equator (equinocti al line), the sun passes through the constellation every 16th of Feb. through 11th of Mar. In the zodiac, the Aquarius is the incarnation of Ganymede, a decent-looking boy. In his hands he holds a pot which stores wine favored by the deities. The pot is upside-down, and the wine flows south into the mouth of the Piscis Austrinus. (Right)
Now let's introduce the stars in the Aquarius. In the autumn night sky, the constellation does not stand out. There are no first and second magnitude stars within. Its most noted feature is the Y shape consisted of the G, Z, H, and P star that make up the "pot". Despite their dimness, they are easily spotted in a dim night sky as the mythical "pot". The brightest star in the Aquarius is its yellow-looking B star, Sadalsuud (it's the Arabic word for "Luckiest of the lucky"), with a magnitude of 2.9. It is Ganymede's left shoulder. The second brightest star, A star, called Sadalmelik (the Arabic word for "lucky stars of the king")and acts as Ganymede's right shoulder, has a magnitude of 3.0 and also looks yellow. The third of all is Ganymede's right foot D star, Scheat, with magnitude 3.3.
2007-10-19 12:12:30 補充：
Even though no bright stars are found within the Aquarius, many famous nebulae exist in it. Among the nebulae the N.G.C. 7293 and the N.G.C.7009 are ring-shaped nebulae. N.G.C.7293, called Helix Nebula, docks by the U star and is the biggest of ring-shaped nebulae, with the size of half the moon.
2007-10-19 12:12:57 補充：
It is also the closest ring-shaped nebula to our solar system, but it can only be seen through high-magnification telescopes due to the largeness of its surface area that scatters the sunlight.
2007-10-19 12:13:13 補充：
The N.G.C.7009 Nebula is called Saturn Nebula. It is smaller than Helix in size and less observable. There are two spherical nebulae. One of them is the M2 Nebula, which is one of the brighter nebulae in the sky.
2007-10-19 12:13:22 補充：
To the north of the B star, it can be seen with naked eye on a clear night. It has a round glow which is relatively bright and has a diameter of approx.4.8". It is 40000 light-yearsaway from Earth. The other is the M72 Nebula, located south of the E star. Its dimness is what makes it hard to trace.參考資料： Me