While we often associate clouds with Earth, the answer is actually Venus.

Here's why:

* Thick Atmosphere: Venus has a incredibly dense atmosphere, about 90 times thicker than Earth's. This thick atmosphere traps heat, leading to a runaway greenhouse effect and scorching temperatures.

* Sulfuric Acid Clouds: The clouds of Venus are primarily composed of sulfuric acid, giving the planet its characteristic yellowish appearance. These clouds are incredibly dense and cover the entire planet.

* High Reflectivity: The thick, reflective clouds of Venus reflect a large amount of sunlight back into space, making it the brightest object in the night sky (after the Moon).

While Earth has clouds, they are nowhere near as dense or widespread as those on Venus.