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…

船底座的WR32及星际星云

船底座的WR32及星际星云

ByNASA中文

2021年02月08日 WR32 and Interstellar Clouds in Carina Image Credit & Copyright: Ariel Cappelletti Explanation: Stars can be like artists. With interstellar gas as a canvas, a massive and tumultuous Wolf-Rayet star has created the picturesque ruffled half-circular filaments called WR32, on the image left. Additionally, the winds and radiation from a small cluster of stars, NGC 3324, have sculpted a 35 light year cavity on the upper right, with its right side appearing as a recognizable face in profile. This region’s popular name is the Gabriela Mistral Nebula for the famous Chilean poet. Together, these interstellar clouds lie about 8,000 light-years away in the Great Carina Nebula, a complex stellar neighborhood harboring numerous clouds of gas and dust rich with imagination inspiring shapes. The featured…

哈伯望远镜的船底座大星云全景图

哈伯望远镜的船底座大星云全景图

ByNASA中文

2019 June 23 哈勃望远镜的船底座大星云全景图 影像提供：NASA，ESA，N。Smith（美国加州大学伯克利分校）等人和The Hubble Heritage Team（STScI / AURA） 说明：极端活跃的恒星会如何影响周围的环境呢？为解谜提供助力，天文学家针对船底座大星云，这个地球夜空最大的恒星形成区之一的中心，制作了一幅组合了48张照片的高解析彩色全景图。这幅摄于2007年的主题影像，是截自目前为止最细致的船底座大星云影像。编录号为NGC 3372的船底座大星云，拥有数量众多的丝状炽热气体，潭状的低温气体，结状的黝黑云球，以及柱状的致密星际尘埃物质。位于影像中左方的钥孔星云，内部有数颗现有最大质量的恒星。这些庞大且极端活跃的恒星，极可能是诞生于黝黑云球内，并用它们高能的星光，外泛的恒星风，与及最后生命终结时以超新星爆炸的方式改变星云的外观。肉眼即可见的船底座大星云，位在南天的船底座之内，整体的大小有450光年，距离我们则约有8500光年远。 Carina Nebula Panorama from Hubble Image Credit: NASA, ESA, N. Smith (U. California, Berkeley) et al., and The Hubble Heritage Team (STScI/AURA) Explanation: How do violent stars affect their surroundings? To help find out, astronomers created a 48-frame high-resolution, controlled-color panorama of the center of the Carina Nebula, one of the largest star forming regions on the night sky. The featured image, taken in 2007, was the most detailed image of the Carina Nebula yet taken. Cataloged as NGC 3372, the Carina Nebula is home to streams of hot gas, pools of cool gas, knots of dark globules, and pillars of dense dusty interstellar matter. The Keyhole Nebula, visible left of center, houses…