Description: 在一個隨著時間推移而 "穩定 "下來，達到所謂熱平衡的物理系統中，系統的每種變化方式（每個 "自由度"）平均具有相同的能量。系統的溫度就是衡量這種平均能量有多大的物理量。

溫度在自然科學中的所有學科以及日常生活的幾乎所有方面都很重要。最常用的溫標是攝氏溫標（原名攝氏度，用 °C 表示）、華氏溫標（用 °F 表示）和開爾文溫標（用 K 表示）。後者主要用於科學目的。理論上的最低溫度是絕對零度（0 K = -273.15°C），在這個溫度下，物體無法再提取出熱能。在恆星核中，溫度超過 1,000 萬 K，而在星際氣體的冷分子雲中，溫度可低至 10 K。

Related Terms:

• 絕對零度
• Energy
• Thermal Radiation

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".