Venus — The Hot Cloud Planet

VENUS is the SECOND planet from the sun and almost the same size as Earth. From space, it looks like a bright pearl — covered by thick yellowish-white clouds. People long ago called Venus the Morning Star or Evening Star because it's often the brightest object in our sky after the Sun and Moon.

But Venus is FAR from a friendly twin to Earth. Its atmosphere is mostly carbon dioxide, with clouds of sulfuric acid (yes — acid rain!). The surface temperature is around 870°F (465°C) — hotter than Mercury, even though Venus is farther from the sun! Why? An EXTREME GREENHOUSE EFFECT. The thick atmosphere traps heat. Venus is a warning of what runaway climate change could do.

Spinning oddly. Venus spins BACKWARDS compared to most planets (so the sun rises in the west). And SLOWLY — one Venus day is 243 Earth days, longer than its year (225 days). The atmosphere also spins much faster than the surface — winds reach 200+ mph at cloud-top heights. It's an alien world.

Venus shows that Earth-size planets aren't automatically habitable. The atmosphere and chemistry matter as much as the size. It also reminds us how precious — and fragile — our climate balance really is.