词条外星智能

即 地外智能；地外智慧；外星智慧

描述: 外星智能指地球外可能存在的其他智慧实体。

对地外智慧生命的搜寻包括寻找无线电或其他信号，但目前的研究主要集中在研究地球以外是否存在产生智慧生命的条件。根据现有证据，地球上出现生命的必要条件应该存在于我们银河系内外的许多其他行星上，这些条件包括：一颗固体行星，与恒星保持一定距离以保证行星表面可以存在液态水、碳和氧等原子，以及更复杂分子。因此，有理由假设至少在其中一些行星上可能已经出现了智慧生命，这并不是一个不合理的假设，尽管我们没有确凿的依据来估计这种情况发生的概率。

作为搜索地外智慧生命（SETI）计划的一个课题，一些天文学家已经开始使用无线电信号来搜索外星智能的信息。光速是一个基本的物理极限，导致我们星际旅行需要很长时间，从而限制了我们与外星智能直接接触的能力。

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The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".

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其他语言版本

阿拉伯语: ذكاء من خارج الأرض
德语: Extraterrestrische Intelligenz
英语: Extraterrestrial Intelligence
法语: Intelligence extraterrestre
意大利语: Intelligenza extraterrestre
巴西葡萄牙语: Inteligência extraterrestre
繁体中文: 外星智能

相关媒体

阿雷西博信息

图注： 这张图片展示的是名为"阿雷西博信息"的星际无线电讯号示意图。在这幅图像中，不同部分以色彩区分。该信息于1974年11月16日从波多黎各的阿雷西博射电望远镜发射。在当时，这是全球最大的射电望远镜。讯号目的地是武仙座的球状星团M13。它是它这一类别中最明亮的星团之一，包含约50万颗恒星，距离地球约2.5万光年。因为M13恒星密集度高，也就是说讯号能抵达更多恒星及可能存在的行星，科学家选择了它作为目标。此外，在发射当时当地可见的球状星团中，M13属于相对较近的天体。阿雷西博信息是一次象征性活动，旨在证明人类具备向星际发送讯号的能力。这条包含1679个数据位（该数字是两个质数的乘积）的讯号，经二维矩阵排列后形成了图示画面。信息由七个部分组成，呈现了DNA双螺旋结构、人类形态、地球及太阳系的相关数据。讯号内容由康奈尔大学与阿雷西博天文台的科学家团队共同设计。
来源： Arne Nordmann（维基共享资源用户 norro）来源链接

License: CC-BY-SA-3.0 知识共享许可协议 Attribution-ShareAlike 3.0 Unported 图标

Gold plaque with drawings of a man & woman, Pioneer spacecraft, solar system, a hydrogen atom and lines converging on Earth

Pioneer Plaques

图注： The Pioneer 10 and 11 spacecraft are the first human-made objects to leave the solar system and venture into interstellar space. To inform potentially intelligent species about our existence, they both carry small metal plaques identifying their time, place of origin and information about their builders. They provide the location of our solar system in the Milky Way by depicting the Solar System's position relative to 14 pulsars, with radiating lines that include information about their frequencies. A model of a hydrogen atom undergoing one particular atomic transition is depicted. The wavelength and frequency of this transition are used to express sizes and frequencies of the other items shown in the plaque. A more detailed view of Earth's position in the solar system, with the spacecraft's trajectory moving away from Earth, passing Mars and Jupiter is displayed at the bottom. The plaque also depicts a naked man and woman alongside the spacecraft to provide a sense of scale. The man’s hand is raised as a friendly gesture. The 6-inch by 9-inch gold-anodized aluminum plate has the design engraved on it. It was attached to the support struts of the spacecraft's antenna to try to to protect it from erosion by any interstellar dust the spacecraft may encounter on its journey. Designed by Carl Sagan and Frank Drake, with artwork by Linda Salzman Sagan, these plaques are meant to communicate the origin of the spacecraft to any extraterrestrial life that might encounter them. While Pioneer 10 is on a course towards the star Aldebaran in the Taurus constellation, which will take about two million years to reach, Pioneer 11 is heading in a different direction towards the constellation of Aquila. It will take approximately four million years to pass close to some of the constellation’s stars.
来源： NASA Ames 来源链接

License: PD 公共领域图标