Here's why:

* Large and Cold: Uranus is a gas giant, meaning it's mostly composed of hydrogen and helium. It has a very cold atmosphere, with temperatures dropping to -224 degrees Celsius (-371 degrees Fahrenheit).

* Distance: Uranus orbits the sun at an average distance of 2.87 billion kilometers (1.78 billion miles).

While there might be other planets in the universe that fit this description, based on our current understanding of the solar system, Uranus is the most likely candidate.