Uranus
That would be Venus.
The composition of a planet's atmosphere, including the presence of oxygen, is crucial for human respiration. Depending on the composition, a thick atmosphere might not contain enough oxygen for human survival, making it impossible to breathe. Additionally, other gases or compounds in the atmosphere can be harmful or toxic to humans.
Venus is the planet surrounded by a thick atmosphere of deadly gases. Its atmosphere is composed mainly of carbon dioxide and sulfuric acid clouds, creating a harsh environment with extreme temperatures and pressure on the surface.
The only outer planet without a thick atmosphere is Uranus. It has a thin atmosphere composed mostly of hydrogen and helium with traces of methane.
The atmosphere of Venus is the layer of gases surrounding Venus. It is composed primarily of carbon dioxide and is much denser and hotter than that of Earth.
you're probably thinking about Venus, with it's extremely thick carbon dioxide atmosphere and it's acidic clouds of sulfur dioxide. though by technicality the gas giants also meet this description.
The atmosphere of Jupiter is considered thick compared to Earth's atmosphere. It is composed mainly of hydrogen and helium gases, with traces of other elements. The atmosphere is much deeper and denser than Earth's atmosphere, extending many kilometers into the planet's interior.
Saturn has the moon Titan which has a thick hazy atmosphere.
Jupiter has enough gravity to hold on to most gases because it is the largest planet in our solar system. Its strong gravitational pull prevents gases from escaping into space, allowing it to maintain its thick atmosphere.
The gassiest planet in our solar system is Jupiter. It is composed mainly of hydrogen and helium, with small amounts of other gases like methane and ammonia. Its atmosphere is thick and turbulent, making it a gas giant planet.
Jupiter is considered the gassiest planet in our solar system. It is composed mostly of hydrogen and helium, with small amounts of other gases. Its massive size and gravity contribute to its ability to retain a thick atmosphere of gases.
Jupiter has a very thick atmosphere composed mainly of hydrogen and helium, along with traces of other gases. This atmosphere is so dense that it becomes increasingly compressed and changes to a liquid-like state deeper within the planet.