Glossary term: 類地行星
Description: 類地行星主要由岩石和鐵等物質構成。類地行星沒有巨型氣體行星上又氫氣和氦氣構成的蓬鬆大氣層，，而是擁有較小的大氣層或根本沒有大氣層。類地行星的質量通常小於巨行星，體積也較小。
在太陽系中，類地行星有水星、金星、地球和火星。
系外行星天文學的主要研究重點之一是尋找大小和組成類似地球的類地行星，尤其是那些位於其恆星宜居帶內的行星。
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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".
Related Media
水星
Credit: 美國國家航空航天局/約翰霍普金斯大學應用物理實驗室/華盛頓卡內基研究所 credit link
License: PD Public Domain icons
可見光下的金星
Credit: 美國宇航局/JPL-加州理工學院 credit link
License: PD Public Domain icons
Venus' surface
Credit: NASA/JPL credit link
License: PD Public Domain icons
阿波羅 17 號觀測到的地球
Credit: 美國國家航空航天局/阿波羅 17 號機組人員/阿波羅項目檔案館
License: PD Public Domain icons
火星
Credit: 美國宇航局/JPL/MSSS credit link
License: PD Public Domain icons
