Description: 外星智能指地球外可能存在的其他智慧實體。

對地外智慧生命的搜尋包括尋找無線電或其他信號，但目前的研究主要集中在研究地球以外是否存在產生智慧生命的條件。根據現有證據，地球上出現生命的必要條件應該存在於我們銀河系內外的許多其他行星上，這些條件包括：一顆固體行星，與恆星保持一定距離以保證行星表面可以存在液態水、碳和氧等原子，以及更復雜分子。因此，有理由假設至少在其中一些行星上可能已經出現了智慧生命，這並不是一個不合理的假設，儘管我們沒有確鑿的依據來估計這種情況發生的概率。

作為搜索地外智慧生命（SETI）計劃的一個課題，一些天文學家已經開始使用無線電信號來搜索外星智能的信息。光速是一個基本的物理極限，導致我們星際旅行需要很長時間，從而限制了我們與外星智能直接接觸的能力。

Related Terms:

• Astrobiology
• Extraterrestrial Life

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

This is an automated transliteration of the simplified Chinese translation of this term

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".