Description: 透鏡狀一詞用於描述具有透鏡形狀的天體。透鏡狀（S0或SB0）星系同時具備螺旋星系和橢圓星系的觀測特徵。透鏡狀星系看起來擁有類似於螺旋星系的盤狀結構和中央凸起，但沒有明顯的螺旋臂；同時，它們主要由老年恆星組成，就像橢圓星系中占主導地位的恆星一樣。透鏡狀星系的形成過程仍然是研究的熱點，而已有一些證據表明，這些星系可能是由星系相互作用產生的結果。

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval

This is an automated transliteration of the simplified Chinese translation of this term

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Caption: The constellation Sextans with its brighter stars and surrounding constellations. Sextans is surrounded by (going clockwise from the top): Leo, Hydra and Crater. Sextans is a small constellation with relatively few bright stars. Sextans spans the celestial equator and thus parts of the constellation are visible at some point in the year across the Earth. The whole constellation is visible in all but the most arctic and most antarctic regions. Sextans is best viewed in the evening in the northern hemisphere spring and southern hemisphere autumn. The lenticular galaxy NGC 3115 lies in Sextans. It is marked here with a red ellipse. The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. The blue line at the top of the diagram marks the ecliptic. Neither the constellation boundaries, nor the lines joining the stars, nor the ecliptic, appear on the sky.
Credit: Adapted by the IAU Office of Astronomy for Education from the original by the IAU and Sky & Telescope