Because they are the furthest planets away from the sun, so they receive less sunlight for warmth.
The three coldest planets in our solar system are Uranus, Neptune, and Pluto. These planets are located far from the Sun, resulting in extremely low temperatures that can reach as low as -224°C on Uranus, -214°C on Neptune, and -229°C on Pluto.
Neptune or Uranus is the coldest Planet. Some reference sources say it's Neptune others say it's Uranus. There's very little difference between them. Neptune is the furthest from the Sun, but it has an internal heat source.
Neptune and Pluto are the two coldest planets!
Uranus and Neptune are the coldest planets in our solar system due to their distance from the Sun and their composition. Uranus has the coldest temperature recorded in our solar system, dropping to -224 degrees Celsius.
neptune and uranus
Uranus and Neptune, although Pluto's orbit sometimes goes inside Neptune's orbit.
neptune and uranus
The hottest planet is Venus. Then Mercury, Earth, Mars, Jupiter, Saturn, Neptune, Uranus, then if it was still a planet, Pluto. (Uranus has been proven to be colder than Neptune, despite Neptune being further from the sun).
Jupiter, Saturn, Uranus and Neptune are planets.. oviously, and pluto is a dwarf planet, was that a serious question..
either Pluto or Neptune cause Pluto is no longer a planet
Neptune. Pluto is no longer classified as a planet.
Jupiter Saturn Uranus Neptune are all gaseous planets Pluto is unknown if it is terrestial or gaseous