发射星云、暗星云与尘埃

2024年1月10日

The Light, the Dark, and the Dusty
Image Credit & Copyright: Gábor Galambos

Explanation: This colorful skyscape spans about three full moons across nebula rich starfields along the plane of our Milky Way Galaxy toward the royal northern constellation Cepheus. Near the edge of the region’s massive molecular cloud some 2,400 light-years away, bright reddish emission region Sharpless (Sh)2-155 is at the center of the frame, also known as the Cave Nebula. About 10 light-years across the cosmic cave’s bright walls of gas are ionized by ultraviolet light from the hot young stars around it. Dusty bluish reflection nebulae, like vdB 155 at the left, and dense obscuring clouds of dust also abound on the interstellar canvas. Astronomical explorations have revealed other dramatic signs of star formation, including the bright reddish fleck of Herbig-Haro (HH) 168. At the upper left in the frame, the Herbig-Haro object emission is generated by energetic jets from a newborn star.

Tomorrow’s picture: unforgotten

发射星云、暗星云与尘埃
影像提供与Copyright: Gábor Galambos

说明: 这幅色彩缤纷的星空影像，涵盖我们银河系盘面上的仙王座富星场约3个满月宽的区域。位在影像中心，离我们约2,400光年远，座落在此区大质量分子云边缘的这团明亮泛红发射星云，则是名为洞窟星云的夏普利斯(Sh) 155。在这个宽约10光年的宇宙洞窟里，其气体边墙受到了邻近炽热年轻恒星的紫外光之电离，不停发出明亮的辐射。影像里，诸如左侧vdB 155这类的尘埃反射云及致密不透光的尘埃云，密布在这片星际视野里。此外，天文观测还找到其他恒星形成的戏剧性迹象，包括影像左上角的赫比格-哈罗天体HH 168；而散发泛红辉光的赫比格-哈罗天体，是由新诞生恒星的高能喷流所造成的。

明日的图片: unforgotten