拉西亚的南天

视频
为 OAE 制作

图注： 这段视频展示了银河在茫茫星空中的璀璨光芒。在群星的大剧场中，南十字星座占据了一席之地，其独特的十字形状在本视频的顶部可见，就在银河系上方，稍微向右。随着视频的推进，南十字座慢慢消失在视野。这个天文记号是南半球的一个突出特征，具有文化和导航意义，几个世纪以来一直是航行路标。与银河的壮观相伴的是两朵麦哲伦云，它们是在遥远天空中翩翩起舞的伙伴。船底座星云为宇宙全景增添了空灵缥缈的光辉，在黑暗中描绘出一种璀璨的色调。在这场天体芭蕾中，温和的绿色笼罩着大气层，这种现象被称为 "气辉"，为夜空增添了一抹微妙的荧光。地面上也有飞机从头顶飞过和车辆在天文台建筑之间行驶的景象。这幅延时摄影是从智利的拉西亚天文台拍摄的，它是一扇通往迷人星舞的窗口，让我们得以一窥银河系令人惊叹的美景和南天的地标。
来源： José Rodrigues/IAU OAE (CC BY 4.0)

词汇表: 天极 , 天球 , 地球自转 , 观测 , 天空 , 南十字星
分类： 肉眼天文学
标签： astrophotography

授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标

此文件在 Zenodo 上 ( 视频 1.07 GB)

故宫星轨

图像
为 OAE 制作

图注： 2022 年 3 月拍摄的这张照片中，北京故宫矗立在星轨编织的夜空芭蕾之下，见证着古老的天体之间的联系。紫禁城在设计时考虑到了宇宙的排列，呼应了北极星的方位，北极星又叫 Polaris，是长期以来指引航海者的天体之锚，象征着天空的稳定。人们相信皇帝是北极星在人间的化身，是连接天地的桥梁。在这张用智能手机拍摄的和谐的一小时曝光照片中，星星的轨迹描绘了它们夜间穿越苍穹的旅程，它们向北极星汇聚，体现了建筑设计和天体轨迹的精确性。
来源： Stephanie Ziyi Ye/IAU OAE (CC BY 4.0)

词汇表: 天极 , 天球 , 拱极星 , 导航 , 北天极（NCP） , 北极星
标签： astrophotography

授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标

此文件在 Zenodo 上 ( 图像 4.12 MB)

星轨

图像
为 OAE 制作

图注： 这张拍摄于2022年10月的照片是在印度阿马尔提亚村（Amartiya）帕诺提耶（Panotiya）的黑夜中拍摄的，展现了夜空中美丽的星轨。摄影师仅用一部智能手机和一个三脚架就捕捉到了这些星轨——它们是我们星球自转的视觉证据，因为每一条星轨都代表着地球自转时恒星的明显运动，创造出令人着迷的宇宙光影编舞。恒星有不同的颜色，有的闪着蓝光，有的泛白，暗示着它们不同的温度和组成。此外，一架飞机的细微轨迹与永恒的星空之舞短暂的交汇在一起，宁静的星空与下方熙熙攘攘的生命活动形成了鲜明对比。
来源： Govind Gurjar/IAU OAE (CC BY 4.0)

词汇表: 天球 , 地球自转
分类： 肉眼天文学
标签： astrophotography

授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标

此文件在 Zenodo 上 ( 图像 1.98 MB)

Gemini South's primary mirror and telescope structure

图像

图注： This is the primary mirror and supporting structure of a large optical telescope at the Gemini South Observatory in Chile. The primary mirror is the largest and most important mirror in a reflecting telescope: its gently curved surface gathers light from faint stars, galaxies, and nebulae and reflects that light to a focal point. At this focal point light is either fed directly in to an instrument to record spectra and images or redirected to such an instrument by a series of further mirrors. The sturdy metal framework around the primary mirros keeps the mirror precisely aligned and protected while the telescope moves to track objects across the sky. In telescopes that use mirrors instead of lenses, such as this one, the mirror is what collects and focuses the light from distant celestial objects. Larger mirrors can capture more light, allowing astronomers to see fainter and more distant objects. A larger primary mirror can also take sharper images of the sky, but this is often negated by the blurring effect of the Earth's atmopshere. A primary mirror must be perfectly smooth to tolerances of fractions of a wavelength of light so that it produces sharp, clear images. We can think of the primary mirror as the “eye” of the telescope that looks out into space, with its shape and support enabling powerful astronomical observations.
来源： International Gemini Observatory/NOIRLab/NSF/AURA/M. Paredes
来源链接

词汇表: 反射式望远镜 , 反射镜
分类： 观测天文学 , 望远镜、仪器与天文台

授权许可： 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 知识共享许可协议 署名 4.0 国际 (CC BY 4.0) 图标

文件 ( 图像 23.24 MB)

Pan-STARRS Survey: Mosaic of the Northern Sky

图像

图注： This circular mosaic was created from thousands of sky images taken by the Pan-STARRS Observatory, a 1.8-meter telescope located on the volcano Haleakalā on Maui, Hawai`i. The centre of the circle marks the north celestial pole, while the outer boundary corresponds to a declination of −30 degrees — the southern limit of the survey from that location. Each part of this image was visited multiple times during the survey with each location imaged in five different colors with multiple images per color to catch objects changing in brightness and to find moving objects such as asteroids. This dataset is a powerful example of an astronomical survey, in which the sky is systematically photographed to build large, uniform catalogs of celestial objects. The wide, bright band running roughly from top to bottom is the Milky Way, with the Galactic centre appearing near the lower edge where the glow is strongest. Across the image are hundreds of millions of detected sources, most of them stars within our own galaxy, along with many distant galaxies in the background. Surveys like Pan-STARRS are essential for studying the structure of the Milky Way and for discovering new objects across vast areas of the sky.
来源： Richard White (STScI), Pan-STARRS1 Science Consortium
来源链接

词汇表: 天文巡天

授权许可： 公共领域 公共领域 图标

文件 ( 图像 6.63 MB)