沃夫-瑞叶恒星18周围的不对称星云

沃夫-瑞叶恒星18周围的不对称星云

ByNASA中文

2022年11月9日 The Asymmetric Nebula Surrounding Wolf-Rayet Star 18 Image Credit & Copyright: Alex Woronow Explanation: Why does the nebula around the star WR-18 shine brighter on one side? Also known as NGC 3199, this active star and its surrounding nebula lie about 12,000 light-years away toward the nautical southern constellation of Carina. The featured deep image has been highly processed to bring out filamentary details of the glowing gas in the bubble-shaped nebula. The nebula is about 75 light-years across. Near the nebula’s center is a Wolf-Rayet star, WR-18, which is a massive, hot, short-lived star that generates an intense and complex stellar wind. In fact, Wolf-Rayet stars are known to create nebulas with interesting shapes as their powerful winds sweep up surrounding interstellar material….

船底座星云的星云

船底座星云的星云

ByNASA中文

2021年05月02日 Clouds of the Carina Nebula Image Credit & Copyright: John Ebersole Explanation: What forms lurk in the mists of the Carina Nebula? The dark ominous figures are actually molecular clouds, knots of molecular gas and dust so thick they have become opaque. In comparison, however, these clouds are typically much less dense than Earth’s atmosphere. Featured here is a detailed image of the core of the Carina Nebula, a part where both dark and colorful clouds of gas and dust are particularly prominent. The image was captured in mid-2016 from Siding Spring Observatory in Australia. Although the nebula is predominantly composed of hydrogen gas — here colored green, the image was assigned colors so that light emitted by trace amounts of sulfur and oxygen…