M31: 仙女座星系
The featured image shows a spiral galaxy and a smaller oval galaxy in a dark starfield. Please see the explanation for more detailed information.
特色图片展示了黑暗星场中的一个螺旋星系和一个较小的椭圆星系。有关更多详细信息，请参阅说明。
标签： 仙女座星系
阿尔卑斯山上空的仙女座星系
2023年11月13日 Andromeda over the Alps Image Credit & Copyright: Dzmitry Kananovich Explanation: Have you ever seen the Andromeda galaxy? Although M31 appears as a faint and fuzzy blob to the unaided eye, the light you see will be over two million years old, making it likely the oldest light you ever will see directly. The featured image captured Andromeda...
南天的仙女座星系
2022年10月21日 Andromeda in Southern Skies Image Credit & Copyright: Ian Griffin (Otago Museum) Explanation: Looking north from southern New Zealand, the Andromeda Galaxy never gets more than about five degrees above the horizon. As spring comes to the southern hemisphere, in late September Andromeda is highest in the sky around midnight though. In a singl...
星系与宇宙沙粒
2021年8月14日 Island Universe, Cosmic Sand Image Credit & Copyright: Marzena Rogozinska Explanation: Stars in our own Milky Way Galaxy are scattered through this eye-catching field of view. From the early hours after midnight on August 13, the 30 second exposure of the night sky over Busko-Zdroj, Poland records the colorful and bright trail of a Perseid me...
单曝光影像里的仙女座星系
2021年06月25日 Andromeda in a Single Shot Image Credit & Copyright: Miguel Claro (TWAN, Dark Sky Alqueva) Explanation: How far can you see? The Andromeda Galaxy, 2.5 million light years away, is the most distant object easily seen by the unaided eye. Other denizens of the night sky, like stars, clusters, and nebulae, are typically hundreds to thousands of ...
火星、昴宿星团与仙女座星系
2020年10月13日 Mars, Pleiades, and Andromeda over Stone Lions Image Credit & Copyright: Cem Özkeser Explanation: Three very different — and very famous — objects were all captured in a single frame last month. On the upper left is the bright blue Pleiades, perhaps the most famous cluster of stars on the night sky. The Pleiades (M45) is about 45...
M106方向的景观
2020 May 1 A View Toward M106 Image Credit & Copyright: Joonhwa Lee Explanation: Big, bright, beautiful spiral, Messier 106 dominates this cosmic vista. The nearly two degree wide telescopic field of view looks toward the well-trained constellation Canes Venatici, near the handle of the Big Dipper. Also known as NGC 4258, M106 is about 80,000 light-year...
仙女座大星系
2020 April 30 Andromeda Island Universe Image Credit & Copyright: Yuzhe Xiao Explanation: The most distant object easily visible to the unaided eye is M31, the great Andromeda Galaxy some two and a half million light-years away. But without a telescope, even this immense spiral galaxy – spanning over 200,000 light years – appears as a faint,...
仙女大星系与缆车站
2020 March 26 Andromeda Station Composite Image Credit & Copyright: Ralf Rohner Explanation: This surreal picture isn’t from a special effects sci-fi movie. It is a digital composite of frames of the real Andromeda Galaxy, also known as M31, rising over a real mountain. Exposures tracking the galaxy and background stars have been digitally combine...
银河系抢劫星际“银行存款”
我们的银河系是个“节俭”的星系。超新星爆炸和剧烈的恒星风将星系盘（galactic disk）中的气体吹出，但这些气体又会落回来，形成新一代恒星。天文学家对整个循环过程进行了全面的核算，发现气体的“收入”竟然比“支出”多。 太空望远镜科学研究所（位于马里兰州巴尔的摩）的天文学家、研究的主要作者Andrew Fox说：“我们预计银河系的‘账单’是平衡的，气体的流入和流出是平衡的，但是哈勃10年的紫外线数据表明，流入比流出要多。”这篇文章将发表在《天体物理学杂志》上。Fox表示，就目前而言，过量流入气体的来源仍然是个谜。 这张插图设想了银河星系盘上下的气体回收过程。哈勃用其精确的宇宙起源光谱仪（COS）观测到了看不见的气体云，Fox的团队通过背景类星体（quasars）发出的光来检测这些云的运动。（类星体是活跃星系...