Copyright:
原文:
Named for the three astronomers instrumental in its discovery and identification, Wolf – Lundmark – Melotte (WLM) is a lonely dwarf galaxy. Seen toward the mostly southern constellation Cetus, about 3 million light-years from the Milky Way, it is one of the most remote members of our local galaxy group. In fact, it may never have interacted with any other local group galaxy. Still, telltale pinkish star forming regions and hot, young, bluish stars speckle the isolated island universe. Older, cool yellowish stars fade into the small galaxy’s halo, extending about 8,000 light-years across. This sharp portrait of WLM was captured by the 268-megapixel OmegaCAM widefield imager and survey telescope at ESO’s Paranal Observatory.
中文翻譯:
命名來自三位對其發現和識別具有重要貢獻的天文學家，沃爾夫（Wolf）、倫德馬克（Lundmark）和梅洛特（Melotte）星系（WLM）是一個孤獨的小矮星系。它位於主要的南方星座天兔座（Cetus）方向，距離銀河系約300萬光年，是我們本地星系團中最遙遠的成員之一。事實上，它可能從未與任何其他本地星系團的星系互動過。儘管如此，令人驚豔的粉紅色星際形成區域和炙熱的年輕藍色星星點綴著這個孤立的宇宙島嶼。較老的、冷黃的星星則隱約存在於這個小星系的光暈中，光暈直徑約8000光年。這張WLM的清晰肖像是由歐洲南方天文台（ESO）位於帕拉納爾天文台的268百萬像素OmegaCAM廣域成像儀和調查望遠鏡拍攝的。
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來源:NASA每日圖片
