The Kuiper Belt is an expansive region of space that extends beyond Neptune’s orbit and is home to many icy bodies, including dwarf planets like Pluto. The temperatures in the Kuiper Belt are incredibly low, typically hovering around -240 degrees Celsius (-400 degrees Fahrenheit).
This frigid atmosphere is a result of its vast distance from the Sun, which means sunlight is minimal. The sunlight that does reach the Kuiper Belt is too weak to significantly warm the objects located there. Many of these icy bodies are composed predominantly of frozen volatiles, such as water, ammonia, and methane, which contribute to the cold temperatures.
In summary, the Kuiper Belt is one of the coldest regions within our solar system, making it a fascinating area for scientific exploration.