Question

Why venus is the brightest planet than other planets?

Answer 1

Here is your answer.

Venus has a high albedo close to 7, meaning it reflects 70% of the sunlight striking it. Albedo is a comparison between how much light strikes an object and how much is reflected. It's because of the acidic clouds in its atmosphere. Howerver, Venus isn’t the most reflective body in our solar system. That honor goes to Enceladus, a moon of Saturn. Its icy surface reflects some 90% of the sunlight striking it. Moon reflects only 10% of the sunlight striking it.

Hope that answers the question.

Answer 2

Venus is the brightest planet in Earth’s night sky because of its highly reflective acidic atmosphere. Over billions of years the atmosphere of Venus has become incredibly thick, likely because of something known as the runaway greenhouse effect, where its volcanic activity contributed to an incredibly dense atmosphere. Such is its thickness now that Venus reflects over 70% of the sunlight that reaches it. Light bounces easily of the clouds, containing sulphuric acid and acidic crystals, high in the atmosphere. This is what makes the planet so bright.

By comparison the Moon reflects only 10% of light that hits it, but because of its proximity to Earth it appears brighter to us.hope it helps