why is venus the hottest planet

Venus is the hottest planet in our solar system due to its extreme greenhouse effect, despite being farther from the Sun than Mercury.

Greenhouse Effect Explained

Venus traps heat through its incredibly thick atmosphere, mostly carbon dioxide (about 96%), which acts like a blanket. Sunlight passes through but infrared heat can't escape, causing surface temperatures to hit around 464°C (867°F)—hot enough to melt lead.

This runaway greenhouse turned Venus from a potentially habitable world into an inferno, unlike Earth where oceans and life help regulate CO2.

Why Hotter Than Mercury?

Mercury, closest to the Sun, lacks any real atmosphere, so it radiates heat away at night, with temps swinging from 430°C daytime to -180°C.

Venus's dense air (92 times Earth's pressure) evenly distributes heat planet- wide, no day-night swings.

Planet| Avg. Distance to Sun| Surface Temp| Atmosphere Key Factor
---|---|---|---
Mercury| 58 million km| 167°C avg. (430°C max)| None—cools quickly 1
Venus| 108 million km| 464°C| Thick CO2—traps heat 37

Forum Buzz & Comparisons

Reddit threads highlight Venus as a warning for Earth: without oceans to lock carbon in rocks, runaway warming boils away water, freeing more CO2. Users note Venus's volcanism pumps extra CO2, absent on arid Mercury.

"Venus doesn't have more carbon than Earth, but... all carbonates dissolved into CO2."

Recent Mission Insights

Soviet Venera probes in the 1970s survived ~1 hour on Venus, snapping pics amid 460°C crush. NASA's eyeing cloud cities 50km up (habitable temps), skipping the hellish surface.

TL;DR: Thick CO2 blanket via runaway greenhouse makes Venus hottest, not solar proximity.

Information gathered from public forums or data available on the internet and portrayed here.