词条角分辨率

即 Angular Discrimination
指向 分辨率

描述: 分辨率或角分辨率是两个靠近的点之间可以被视为刚刚分开的最小角度。它也可以被认为是点的扩散（例如恒星），这主要是由于望远镜的光学原理。这是望远镜一个非常重要的特性，因为具有更高角分辨率的望远镜使我们能够在视觉上分辨彼此非常靠近的恒星，并看到星云和星系等扩展物体的更精细细节。角距小于分辨率的两颗恒星将显示为单个天体。望远镜的分辨率可以通过增大光学聚焦镜或透镜的尺寸来提高。此外，它还取决于波长，并且随着波长的增加而变得更差。

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其他语言版本

阿拉伯语: الدفة الزاوية
孟加拉语: কৌণিক বিভেদন
德语: Auflösungsvermögen
英语: Angular Resolution
西班牙语: Resolución Angular
法语: Résolution angulaire
意大利语: Risoluzione angolare
日语: 角分解能 (外部链接)
尼泊尔语: कोणीय विभेदन
巴西葡萄牙语: Resolução angular
繁体中文: 角分辨率

相关媒体

Low-resolution view of a single object with a highlighted area showing a higher-resolution image revealing two brown dwarfs.

A binary brown dwarf system revealed

图注： This image presents a nearby system of brown dwarfs, objects that fall between planets and stars in mass and do not sustain long-term nuclear fusion in their cores. Located about 6.5 light-years from Earth, this system (known as Luhman 16) is the third closest system to the Solar System after the Alpha Centauri system and Barnard's Star. It was initially observed as what seemed to be a single faint source of infrared light. Brown dwarfs are often difficult to study because of their low brightness, especially in visible light. However they shine brighter in infrared light due to their cooler effective temperatures. The comparison highlights the importance of observational resolution. The image at the center, taken by NASA’s Wide-field Infrared Survey Explorer (WISE), shows the system as a single blurred object due to its lower resolution (WISE has a resolution of roughly 6 arcseconds). A highlighted zoomed-in view from the Gemini South Observatory in Chile reveals that this “single” source is actually a binary system of two brown dwarfs. The improved angular resolution (roughly 0.6 arcseconds) allows astronomers to separate the two objects clearly, demonstrating how higher-resolution observations uncover hidden structures in the universe. While the Gemini telescope is situated on the Earth and thus is affected by the blurring effects of the Earth's atmosphere, it has a substantially larger mirror than the WISE telescope (8m wide vs. 40cm wide) meaning it can achieve much higher resolutions.
来源： NASA/JPL/Gemini Observatory/AURA/NSF 来源链接

License: PD 公共领域图标