Why is Venus the brightest planet seen from Earth?

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Venus is the most brilliant planet in the sky when it is visible from Earth. Its exceptional brightness is primarily due to its high albedo, which is a measure of the fraction of light reflected by a body.12

Venus is shrouded in a dense, continuous layer of clouds that reflects approximately 85 percent of the sunlight that strikes them. Because of this thick cloud cover, the planet possesses a high Bond albedo of 0.75, meaning it reflects a significant portion of incident solar radiation back into space. This reflective quality, combined with the planet's relatively close proximity to Earth, results in its luminous, jewel-like appearance in the sky.321