螺旋星系 NGC 6744
Spiral Galaxy NGC 6744
來源:John Hayes|發表日期:2024-11-01
美麗的大螺旋星系 NGC 6744 的直徑接近 17 . 5 萬光年,比我們的銀河系還要大。它位於大約 3000 萬光年遠的南方馬伕座,但在小型望遠鏡的目鏡中卻只是一個模糊的斑點。在這幅非常深邃和細緻的星系肖像中,我們看到了附近島嶼宇宙的圓盤向我們的視線傾斜,這幅望遠鏡影像的範圍大約相當於一個滿月的角大小。在這張照片中,這個巨型星系拉長的淡黃色核心被來自古老、低溫恆星的光線所覆蓋。在核心之外,巨大的旋臂上佈滿了年輕的藍色星團,並點綴著粉紅色的恆星形成區。一條延伸的旋臂掠過左上方較小的衛星星系 NGC 6744 A。NGC 6744 的星系伴星系讓人想起銀河系的衛星星系大麥哲倫雲。
原文:Big, beautiful spiral galaxy NGC 6744 is nearly 175,000 light-years across, larger than our own Milky Way. It lies some 30 million light-years distant in the southern constellation Pavo but appears as only a faint smudge in the eyepiece of a small telescope. We see the disk of the nearby island universe tilted towards our line of sight in this remarkably deep and detailed galaxy portrait, a telescopic image that spans an area about the angular size of a full moon. In it, the giant galaxy's elongated yellowish core is dominated by the light from old, cool stars. Beyond the core, grand spiral arms are filled with young blue star clusters and speckled with pinkish star forming regions. An extended arm sweeps past smaller satellite galaxy NGC 6744A at the upper left. NGC 6744's galactic companion is reminiscent of the Milky Way's satellite galaxy the Large Magellanic Cloud.
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