金星的温室效应为什么会失控？
Why did Venus's greenhouse effect run away?
金星曾可能有过液态水海洋，但强烈的太阳辐射使水汽蒸发进入大气。水蒸气本身就是强温室气体，进一步升温又蒸发更多水，最终海洋全部蒸发，二氧化碳也大量释放，形成今天的极热世界。这被称为失控温室效应。
Venus may once have had liquid-water oceans, but intense solar radiation evaporated the water into the air. Water vapor is itself a strong greenhouse gas, so warming released even more, until the oceans boiled away and huge amounts of carbon dioxide built up. This is called a runaway greenhouse effect.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
苏宜,《天文学新概论》第5版,科学出版社
Su Yi, Introduction to Astronomy, 5th ed., Science Press
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787030620477（豆瓣书目条目: 天文学新概论）
#金星 #温室效应 #气候
金星的天空为什么是黄色的，还下硫酸雨？
Why are Venus's skies yellow and its rain made of sulfuric acid?
金星高空有厚厚的硫酸云，由火山释放的硫化物和阳光反应生成，使天空呈现黄白色。云中的液滴会以硫酸雨形式下落，但因高温在到达地面前就蒸发，形成『永不落地』的酸雨循环。这层云也是强温室效应的重要一环。
Venus has thick sulfuric-acid clouds high up, formed from volcanic sulfur compounds reacting with sunlight, giving the sky a yellow-white hue. Droplets fall as acid rain but evaporate before reaching the surface because of the heat, creating a rain that never lands. This cloud deck is also a key part of the strong greenhouse effect.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
苏宜,《天文学新概论》第5版,科学出版社
Su Yi, Introduction to Astronomy, 5th ed., Science Press
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787030620477（豆瓣书目条目: 天文学新概论）
#金星 #硫酸云 #酸雨
金星厚厚的云层是由什么组成的？
What are Venus's thick clouds made of?
金星云层主要由浓硫酸液滴构成，而非地球那样的水云，这层云把大部分阳光反射掉，使金星在夜空中格外明亮。
Venus's clouds are made mainly of droplets of concentrated sulfuric acid rather than water like Earth's clouds; this layer reflects most sunlight, making Venus exceptionally bright in the sky.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
苏宜,《天文学新概论》第5版,科学出版社
Su Yi, Introduction to Astronomy, 5th ed., Science Press
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787030620477（豆瓣书目条目: 天文学新概论）
#金星 #云 #硫酸
金星为什么是逆向自转的？
Why does Venus rotate backwards?
大多数行星自转方向与公转一致，金星却相反，而且转得非常慢，一个金星日约243个地球日。一种解释是它早期遭巨大天体撞击，把自转方向打乱。浓厚的云层和潮汐作用也可能后来进一步改变了它的转速。
Most planets spin the same way they orbit, but Venus spins the opposite way and very slowly, with a Venus day of about 243 Earth days. One explanation is a giant impact early on that flipped its rotation. Thick clouds and tidal effects may also have slowed and reversed it later.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
苏宜,《天文学新概论》第5版,科学出版社
Su Yi, Introduction to Astronomy, 5th ed., Science Press
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787030620477（豆瓣书目条目: 天文学新概论）
#金星 #逆向自转 #撞击
金星的自转有什么特别之处？
What is unusual about Venus's rotation?
金星自转方向与水星等多数行星相反（逆行），且自转极慢，一天比一年还长。
Venus spins backward (retrograde) compared with most planets, and it rotates so slowly that a single Venus day is longer than its year.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
苏宜,《天文学新概论》第5版,科学出版社
Su Yi, Introduction to Astronomy, 5th ed., Science Press
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787030620477（豆瓣书目条目: 天文学新概论）
#金星 #自转 #逆行
金星表面的气压有多高？
How high is the surface pressure on Venus?
金星表面的大气压约为地球的92倍，相当于地球深海约900米处的压力。如此高压加上约465摄氏度的高温，使金星表面环境极为恶劣。苏联的『金星』系列探测器曾短暂在表面工作并传回数据。
The surface pressure on Venus is about 92 times that of Earth, comparable to the pressure roughly 900 meters deep in Earth's oceans. Combined with temperatures near 465 degrees Celsius, the surface is extremely hostile. The Soviet Venera probes briefly operated on the surface and sent back data.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
苏宜,《天文学新概论》第5版,科学出版社
Su Yi, Introduction to Astronomy, 5th ed., Science Press
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787030620477（豆瓣书目条目: 天文学新概论）
#金星 #气压 #大气
什么是金星凌日？它为何曾用于测量日地距离？
What is a Venus transit, and why was it once used to measure the Earth-Sun distance?
金星凌日是金星从太阳前方掠过的现象，历史上天文学家通过多地观测凌日时刻的视差，推算出天文单位（日地距离）。
A Venus transit is Venus passing in front of the Sun; historically, observers at different locations timed the transit to derive parallax and thus the astronomical unit (Earth-Sun distance).
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
苏宜,《天文学新概论》第5版,科学出版社
Su Yi, Introduction to Astronomy, 5th ed., Science Press
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787030620477（豆瓣书目条目: 天文学新概论）
#金星 #凌日 #视差
金星表面为什么比水星还热？
Why is Venus's surface hotter than Mercury's?
金星浓密的二氧化碳大气造成极强的温室效应，把热量牢牢锁住，表面温度约 465℃，比离太阳更近的水星还高。
Venus's dense carbon-dioxide atmosphere creates a runaway greenhouse effect that traps heat efficiently, raising its surface to about 465°C—hotter than Mercury despite being farther from the Sun.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
苏宜,《天文学新概论》第5版,科学出版社
Su Yi, Introduction to Astronomy, 5th ed., Science Press
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787030620477（豆瓣书目条目: 天文学新概论）
#金星 #温室效应 #大气