金星（英语、拉丁语：Venus，天文符号：♀），在太阳系的八大行星中，是从太阳向外的第二颗行星，轨道公转周期为224.7地球日，它没有天然的卫星。它的名称源自罗马神话的爱与美的女神，维纳斯，因此金星也称做维纳斯（Venus）。在中国古代称为太白、明星或大嚣，另外早晨出现在东方称启明，晚上出现在西方称长庚。古希腊人称为阿佛洛狄忒，是希腊神话中爱与美的女神。金星的天文符号用维纳斯的梳妆镜来表示。 它在夜空中的亮度仅次于月球，是第二亮的天然天体，视星等可以达到 -4.7等，足以照射出影子。由于金星是在地球内侧的内行星，它永远不会远离太阳运行：它的离日度最大值为47.8°。

Venus is the second planet from the Sun, which it orbits every 224.7 Earth days. It has the longest rotation period rotation period (225 days) of any planet in the Solar System and rotates in the opposite direction to most other planets. It has no natural satellite. It is named after the Roman goddess of love and beauty. It is the second-brightest natural object in the night sky after the Moon, reaching an apparent magnitude of −4.6, bright enough to cast shadows. Because Venus orbits within Earth's orbit (inferior planet), it never appears to venture far from the Sun; the angle between Venus and the Sun (elongation) subtends a maximum arc of 47.8°.