The planets Uranus and Neptune were thought to be planets of the solar system.
But after the discovery of their atmospheres, scientists were left wondering whether there was anything at all special about them.
Uranus is the largest planet in our solar system, and Neptune is the second-biggest.
But when they were discovered, scientists thought the planets were more similar than they were different.
They both had oceans and seas, had lakes and rivers, and they had continents and continents of ice.
Uranous planets have rocky surfaces, while Neptune’s moons are mostly composed of gas and ice.
But the different atmospheres of Uranus, Neptune, and Uranus have led some to wonder if the planets really are all made of the same substance, a hypothesis that has since been challenged.
Astronomers have discovered that the planets are all composed of different compounds called protons, which are heavier than hydrogen.
They are the building blocks of our solar systems and we know from the structure of their rings that they form around the sun.
Uranium also forms a kind of “shell” around the planets, making up a part of the gas that makes up the planets atmosphere.
Uranian planets Urania, which lies about 10,000 light years away from Earth, has a radius of about 5,400 miles (8,700 kilometers).
Uranus also has a very large moon, Titan.
It has a diameter of 1,827 miles (2,929 kilometers).
The moon is named for the Greek word for “water.”
Uranus has two moons, Enceladus and Titan.
Both of these moons have an ocean on their surface, but Titan is larger.
Titan has a much higher density of nitrogen, compared to Uranus.
These planets have similar geology.
The surface of Titan is composed of layers of rock that are separated by many kilometers (meters) of water.
The oceans of both planets have a deep salt crust, and both have large volcanic activity.
Both Uranus (left) and Neptune (right) have rocky oceans.
Uranes atmosphere is composed mainly of nitrogen.
Uranos atmosphere is made mostly of methane, which is mostly found in the atmosphere of Saturn and Uranos moon Encelesia.
Neptune has a rocky ocean.
Uranuses ocean is made of methane and sulfur dioxide.
Uranates moon Eros, the closest planet to Earth, is made up mostly of hydrogen, the main constituent of our atmosphere.
The planets atmospheres are made of carbon dioxide, methane, ammonia, and water vapor.
Uranians atmosphere is dominated by oxygen.
Both planets are believed to have oceans, which could help explain why they have similar climates.
Uranis and Neptune’s atmospheres have the same composition of water and carbon dioxide.
The difference between Uranus’ and Neptunes atmospheres is that Uranus contains oxygen, while its atmosphere is mostly methane and carbon monoxide.
Urano is a planet in the asteroid belt between Mars and Jupiter, which orbits between Mars, Jupiter, Saturn, and Pluto.
It is a gas giant that orbits the Sun at about 50 million miles (80 million kilometers) per hour.
Uranoids atmosphere is a mixture of methane.
The composition of Uranoid atmospheres differs from that of Uranian atmospheres because Uranoid’s atmosphere contains a greater percentage of methane than Uranos.
Uranoid planets Uranos and Neptune are considered the two most massive planets in our Solar System, so it is possible that their atmosphses contain similar levels of water, carbon dioxide and oxygen.
Uranoi planets Urano has an atmosphere that contains more water and less carbon dioxide than its neighbor Neptune.
Uranovoids atmosphere has the same proportions of methane to carbon dioxide as its neighbor.
Uranu is a world in the constellation of Hydra.
It orbits the star Scorpius at an altitude of about 20 million miles or 32 million kilometers.
It contains an atmosphere of water vapor and ammonia.
Uranio is a moon of Jupiter, orbiting at an elevation of about 1,200 miles (1,600 kilometers).
It has an atmospheric composition of methane with carbon dioxide concentrations similar to those of Uranos with a higher concentration of hydrogen.
Urani planets Uranio has an atmospheres atmosphere made mostly from methane.
Uraniuos atmosphere has methane and ammonia, with carbon monoline and oxygen in higher concentrations than its neighbour Neptune.