鹈鹕星云的云气、尘埃与恒星

鹈鹕星云的云气、尘埃与恒星

ByNASA中文

2023年8月7日 The Pelican Nebula in Gas, Dust, and Stars Credit & Copyright: Abe Jones Explanation: The Pelican Nebula is slowly being transformed. IC 5070 (the official designation) is divided from the larger North America Nebula by a molecular cloud filled with dark dust. The Pelican, however, receives much study because it is a particularly active mix of star formation and evolving gas clouds. The featured picture was produced in three specific colors — light emitted by sulfur, hydrogen, and oxygen — that can help us to better understand these interactions. The light from young energetic stars is slowly transforming the cold gas to hot gas, with the advancing boundary between the two, known as an ionization front, visible in bright orange on the right. Particularly…

鹈鹕星云的恒星、尘埃、云柱与喷流

鹈鹕星云的恒星、尘埃、云柱与喷流

ByNASA中文

2022年10月11日 Stars, Dust, Pillars, and Jets in the Pelican Nebula Image Credit & Copyright: Adriano Almeida Explanation: What dark structures arise within the Pelican Nebula? On the whole, the nebula appears like a bird (a pelican) and is seen toward the constellation of a different bird: Cygnus, a Swan. But inside, the Pelican Nebula is a place lit up by new stars and befouled by dark dust. Smoke-sized dust grains start as simple carbon compounds formed in the cool atmospheres of young stars but are dispersed by stellar winds and explosions. Two impressive Herbig-Haro jets are seen emitted by the star HH 555 on the right, and these jets are helping to destroy the light year-long dust pillar that contains it. Other pillars and jets…

北美洲星云与鹈鹕星云

北美洲星云与鹈鹕星云

ByNASA中文

2022年9月8日 North America and the Pelican Image Credit & Copyright: Frank Sackenheim Explanation: Fans of our fair planet might recognize the outlines of these cosmic clouds. On the left, bright emission outlined by dark, obscuring dust lanes seems to trace a continental shape, lending the popular name North America Nebula to the emission region cataloged as NGC 7000. To the right, just off the North America Nebula’s east coast, is IC 5070, whose avian profile suggests the Pelican Nebula. The two bright nebulae are about 1,500 light-years away, part of the same large and complex star forming region, almost as nearby as the better-known Orion Nebula. At that distance, the 3 degree wide field of view would span 80 light-years. This careful cosmic portrait uses…

北美洲与鹈鹕

北美洲与鹈鹕

ByNASA中文

2021年9月16日 North America and the Pelican Image Credit & Copyright: Andrew Klinger Explanation: Fans of our fair planet might recognize the outlines of these cosmic clouds. On the left, bright emission outlined by dark, obscuring dust lanes seems to trace a continental shape, lending the popular name North America Nebula to the emission region cataloged as NGC 7000. To the right, just off the North America Nebula’s east coast, is IC 5070, whose avian profile suggests the Pelican Nebula. The two bright nebulae are about 1,500 light-years away, part of the same large and complex star forming region, almost as nearby as the better-known Orion Nebula. At that distance, the 3 degree wide field of view would span 80 light-years. This careful cosmic portrait uses…

红蓝相间的鹈鹕星云

红蓝相间的鹈鹕星云

ByNASA中文

2021年03月01日 The Pelican Nebula in Red and Blue Image Credit & Copyright: M. Petrasko, M. Evenden, U. Mishra (Insight Obs.) Explanation: The Pelican Nebula is changing. The entire nebula, officially designated IC 5070, is divided from the larger North America Nebula by a molecular cloud filled with dark dust. The Pelican, however, is particularly interesting because it is an unusually active mix of star formation and evolving gas clouds. The featured picture was processed to bring out two main colors, red and blue, with the red dominated by light emitted by interstellar hydrogen. Ultraviolet light emitted by young energetic stars is slowly transforming cold gas in the nebula to hot gas, with the advancing boundary between the two, known as an ionization front, visible in…

鹈鹕星云的云气、尘埃与恒星

鹈鹕星云的云气、尘埃与恒星

ByNASA中文

2019 September 25 The Pelican Nebula in Gas, Dust, and Stars Image Credit & Copyright: Yannick Akar Explanation: The Pelican Nebula is slowly being transformed. IC 5070, the official designation, is divided from the larger North America Nebula by a molecular cloud filled with dark dust. The Pelican, however, receives much study because it is a particularly active mix of star formation and evolving gas clouds. The featured picture was produced in three specific colors — light emitted by sulfur, hydrogen, and oxygen — that can help us to better understand these interactions. The light from young energetic stars is slowly transforming the cold gas to hot gas, with the advancing boundary between the two, known as an ionization front, visible in bright orange on…