A starfield is dominated by light brown dust. In the middle is a parabolic gas cloud opening toward the lower right. A bright star is near the center at the apex of the parabolic gas cloud. Please see the explanation for more detailed information.
星空主要由浅棕色尘埃组成。中间是向右下方张开的抛物线气体云。抛物线气体云顶点中心附近有一颗明亮的恒星。有关更多详细信息，请参阅说明。
2023年9月19日 HH 211: Jets from a Forming Star Credit: NASA, ESA, CSA, Webb; Processing: Tom Ray (DIAS Dublin) Explanation: Do stars always create jets as they form? No one is sure. As a gas cloud gravitationally contracts, it forms a disk that can spin too fast to continue contracting into a protostar. Theorists hypothesize that this spin can be reduced by expelling jets. This speculation coincides with known Herbig-Haro (HH) objects, young stellar objects seen to emit jets — sometimes in spectacular fashion. Pictured is Herbig-Haro 211, a young star in formation recently imaged by the Webb Space Telescope (JWST) in infrared light and in great detail. Along with the two narrow beams of particles, red shock waves can be seen as the outflows impact…
2023年7月28日 Young Stars, Stellar Jets Image Credit: NASA, ESA, CSA, Processing: Joseph DePasquale (STScI) Explanation: High-speed outflows of molecular gas from a pair of actively forming young stars shine in infrared light, revealing themselves in this NIRcam image from the James Webb Space Telescope. Cataloged as HH (Herbig-Haro) 46/47, the young stars are lodged within a dark nebula that is largely opaque when viewed in visible light. The pair lie at the center of the prominent reddish diffraction spikes in the NIRcam image. Their energetic stellar jets extend for nearly a light-year, burrowing into the dark interstellar material. A tantalizing object to explore with Webb’s infrared capabilities, this young star system is relatively nearby, located only some 1,140 light-years distant in the nautical constellation Vela….
2022年1月27日 South of Orion Image Credit & Copyright: Vikas Chander Explanation: South of the large star-forming region known as the Orion Nebula, lies bright blue reflection nebula NGC 1999. At the edge of the Orion molecular cloud complex some 1,500 light-years distant, NGC 1999’s illumination is provided by the embedded variable star V380 Orionis. The nebula is marked with a dark sideways T-shape at center right in this telescopic vista that spans about two full moons on the sky. Its dark shape was once assumed to be an obscuring dust cloud seen in silhouette. But infrared data suggest the shape is likely a hole blown through the nebula itself by energetic young stars. In fact, this region abounds with energetic young stars producing jets and…
2020 May 25 Mystic Mountain Monster being Destroyed Image Credit: Hubble, NASA, ESA; Processing & License: Judy Schmidt Explanation: Inside the head of this interstellar monster is a star that is slowly destroying it. The huge monster, actually an inanimate series of pillars of gas and dust, measures light years in length. The in-head star is not itself visible through the opaque interstellar dust but is bursting out partly by ejecting opposing beams of energetic particles called Herbig-Haro jets. Located about 7,500 light years away in the Carina Nebula and known informally as Mystic Mountain, the appearance of these pillars is dominated by dark dust even though they are composed mostly of clear hydrogen gas. The featured image was taken with the Hubble Space Telescope….
Chamaeleon II Dark Cloud Image Credit & Copyright: Don Goldman Explanation: A small constellation hiding near the south celestial pole, The Chamaeleon boasts no bright stars. Stars are forming within its constellation boundaries though, in a complex of dark, dusty molecular clouds. Some 500 light-years distant, the Chamaeleon II dark nebula inhabits this view where the cosmic dust clouds standout mostly in silhouette against the starry southern sky. The telescopic frame is about the angular size of a Full Moon and so spans about 5 light-years at the dark cloud’s estimated distance. Scattered near center a telltale reddish glow from identified Herbig-Haro objects is seen in the sharp image, jets of shocked glowing gas emanating from recently formed stars. 蝘蜓座II暗星云 影像提供与版权: Don Goldman 说明: 蝘蜓座是南天极附近，一个里头没有亮星的小星座。不过，这个星座里的黝黑尘埃分子云复合体，仍不停的在形成恒星。在这幅影像里，距离约500光年远的蝘蜓座II暗分子云，之所以会以剪影之姿现踪，是因为有南天的繁星为衬托。这幅张角与满月相当的望远镜影像，依这团暗星云的估计距离来换算，大约涵盖了5光年的区域。在这幅清晰影像中心附近，带着特征泛红辉光的物体，是因刚诞生恒星发出的喷流，冲撞激震周围的云气发光而形成的赫比格-哈罗天体。
