Which planet is the hottest in the solar system?

Venus is the hottest planet in the solar system primarily due to its thick atmosphere, which is composed mainly of carbon dioxide. This dense atmosphere creates a strong greenhouse effect that traps heat, allowing surface temperatures to soar to around 900 degrees Fahrenheit (475 degrees Celsius). The high pressure on Venus, caused by the heavy atmosphere, also contributes to its extreme temperatures.

In contrast, while Earth has a balanced atmosphere that supports life, its temperatures are much more moderate. Mars, being farther from the Sun and having a thin atmosphere, has much colder temperatures. Jupiter, the largest planet, is primarily composed of gas and does not have a solid surface, and though it can be very warm in its upper atmosphere, the core temperatures are not sufficient to make it the hottest planet. Therefore, Venus holds the title for the hottest due to its unique atmospheric conditions and geological factors that facilitate heat retention.