Some of them have effects on the rings too. Life on this planet is impossible. However, some of its moons have the potential for life, especially the ocean worlds of Enceladus and Titan.
Uranus is the second-farthest planet from the Sun. As the seventh planet, it lies roughly 2. As a result, it looks like it is rotating on its side! The astronomer William Herschel discovered it in through a telescope. It had been observed many times before discovery but it was thought to be a star, just like Herschel initially did. Uranus is a big ball of gas just like Jupiter and Saturn.
However, aside from hydrogen and helium, it largely contains water, ammonia, and methane. Uranus has a diameter of about 51, km 31, km. At that size, we can fit four Earths along its equator. Also, it is the third-largest planet in the solar system. With its distance, sunlight travels nearly 3 hours to reach it. A day on Uranus is shorter than a day here on Earth.
A year there takes 84 years—even longer than a human lifetime. Aside from spinning on its side, Uranus rotates from east to west retrograde just like Venus. This tilt causes extreme seasons on this planet. The methane gas in its atmosphere gives Uranus its blue-green appearance. Neptune is the eighth planet and the farthest from the Sun. It was named after the god of the sea in Roman mythology.
Using his calculations, Johann Galle discovered the planet through a telescope in September Just days later, its largest moon, Triton, was also discovered. So far, 14 moons are known to orbit this planet. It also has a ring system. Neptune is about four times as large as Earth. It is an ice giant and is mostly composed of water, methane, and ammonia. Though it is a bit smaller than Uranus, it is much denser. It also has the strongest winds in the entire solar system.
Also, the light that our planet receives is nearly 1, times brighter than that on Neptune. A day there is only 16 hours long but a year takes Earth years. It is in a orbital resonance with Pluto.
That means every time Neptune makes three orbits around the Sun, Pluto makes two. This relationship makes sure they never collide. Scientists are still figuring out why Neptune has a darker blue color than Uranus.
It was visited only once by a spacecraft. Voyager 2 made a flyby on this dark world in For the distances between each of the planets, see our distances between planets calculator. You can also calculate your weight on other planets.
There have been several additional planets hypothesized throughout history. However, none of these planets has ever been found. The most recent of these theorized planets was Planet X, also nicknamed Planet Nine. This is supposedly a giant planet with a very elongated orbit. And because of that, it takes thousands of years to orbit the Sun. Scientists have not made any direct observation of Planet X. The existence of an undiscovered planet was just hypothesized to explain the unusual orbits of Kuiper belt objects KBOs.
However, scientists are also open to other theories that may explain these strange orbits. Pluto is no longer considered a planet under the IAU definition. Yes, but only a very small amount. With that said, we will need spacesuits on Mars because its air is toxic to us. Unfortunately, no. Some of these materials are as small as dust while some are as large as houses.
It has an atmosphere that protects it from radiation. This icy world possibly has a water ocean below the surface. It also has the elements needed for life. Though it is a unique world of its own, it is one of the most possible places for human colonization. Mars looks red because of iron on its surface. Its rocks and dust are rich in iron. Since they are just exposed in the open, the iron reacts with oxygen which results in a red rust color. These swirls of rusty dust are swept up by large storms into the atmosphere making its sky reddish.
Read our post here if you want to learn more about why Mars is red. If you use any of the content on this page in your own work, please use the code below to cite this page as the source of the content. Stewart, Suzy. The Planets. Accessed on January 14, Accessed 14 January, Planet Facts — What Is a Planet? It has sufficient mass to assume hydrostatic equilibrium a nearly round shape. Planet vs Dwarf Planet The Sun, planets, and dwarf planets with arrows.
It has sufficient mass to assume a hydrostatic equilibrium nearly round shape. The object has not cleared the neighborhood around its orbit. Diameter equatorial — at 1 bar : miles 12,km Temperature at 1 bar : degrees Fahrenheit degrees Celsius Mass: 4.
Distance from Earth: Minimum: Diameter equatorial — at 1 bar : miles km Temperature at 1 bar : 68 degrees Fahrenheit 20 degrees Celsius Mass: 6. Diameter equatorial — at 1 bar : 86, miles ,km Temperature at 1 bar : degrees Fahrenheit degrees Celsius Mass: 1.
Distance from Earth: Minimum: million miles million km Maximum: million miles million km. Diameter equatorial — at 1 bar : miles km Temperature at 1 bar : degrees Fahrenheit degrees Celsius Mass: The formal definition of planet, as voted on by the International Astronomical Union in , is as follows:. Under this definition, Pluto is NOT a planet, but has been deemed a dwarf planet because it has not yet cleared its orbit.
This definition is under discussion, particularly by members of the planetary science community, and it may yet be further refined. Skip to content. Click on any planet below to find out more about it: The Planets Mercury Facts.
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