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- In order from the Sun, they are four terrestrial planets (Mercury, Venus, Earth and Mars); two gas giants (Jupiter and Saturn); and two ice giants (Uranus and Neptune). All terrestrial planets have solid surfaces. Inversely, all giant planets do not have a definite surface, as they are mainly composed of gases and liquids.
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An overview of the history, mythology and current scientific knowledge of the planets, moons and other objects in our solar system.
- Planets
The Planets of the Solar System Detailed information and...
- Solar System
Traditionally, the solar system has been divided into...
- Objects
Eight Planets; Objects. Asteroids; Asteroid Types. C-type...
- Questions
Frequently asked space questions to help you learn about...
- Buyer’s Guides
Space and Astronomy Product Reviews We review the best...
- Gas Giants
Planets for Kids; Buyer’s Guides. Best Astronomy Binoculars;...
- The Sun
Similar effects are seen in the gas planets. The...
- The Moon
It’s the fifth-largest moon in our solar system and is the...
- The Planets In Order | From The Sun, Information, History & Definition
- Jupiter | Facts, Information, History & Definition
- Uranus Facts | Rotation, Rings, Atmosphere, Size, History & Definition
- Earth Facts | Surface, Atmosphere, Satellites, History & Definition
- Eris Facts | Temperature, Surface, Information, History & Definition
- Mercury Facts | Information, History, Location, Size & Definition
- Venus Facts | Surface, Atmosphere, Moons, History & Definition
- The Southern Cross Asterism | Facts, Information, History & Definition
- Planets
- Mercury
- Venus
- Earth
- Mars
- Jupiter
- Saturn
- Uranus and Neptune
Mercury is the innermost planet of the solar system, orbiting the sunat an average distance of 58-million kilometres. Mercury is also the smallest planet in the solar system with a diameter of 3,031-miles (4,878-kilometres). Despite its small size, however, Mercury is actually the second densest planet in the solar system after the Earth, and this ...
Venus is the closest planet to Earth and the most similar to our world in terms of size and mass. Since Earth and Venus are located so close to each other, they have similar compositions. Venus is believed to have an iron core surrounded by a mantle and crust composed of rock and metal. Unlike Earth, however, the surface of Venus is dominated by vo...
Like Mercury and Venus, Earth has a core composed mostly of iron, along with small amounts of nickel and other metals. The surface of our world is dominated by silicate rock. Thus, the Earth has many similarities to the other rocky planets in terms of composition, yet one very unique aspect of our world is its atmosphere. Unlike every other planet ...
Marsis the outermost of the rocky planets, and it is perhaps the most studied planet in the solar system after the Earth. Like the other three rocky planets, Mars has an iron core sounded by a surface of silicate rock, yet there are some unique features of Mars, such as frozen carbon dioxide and monoxide at its poles. The atmosphere of Mars is arou...
Jupiter is the largest, most massive planet in the solar system. Despite its large size, its composition is rather simple. Jupiter is primarily composed of just two elements: hydrogen and helium, along with trace amounts of other chemicals such as water, sulfur, methane, and ammonia. Around 90% of Jupiter is hydrogen, while the remaining 10% is alm...
Saturnis very similar to Jupiter in terms of composition. Like Jupiter, Saturn is primarily composed of hydrogen and helium, along with trace amounts of other chemicals. Despite its nearly identical composition, however, Saturn looks significantly different than Jupiter, almost as if it’s a watered down version of Jupiter. This is likely due to the...
Like Jupiter and Saturn, Uranus and Neptune are both primarily composed of hydrogen and helium. However, the two outermost planets are somewhat different in terms of composition. Hydrogen and helium are not as abundant on Uranus and Neptune, and there is a higher presence of other chemicals. Interestingly, the densities of Uranus and Neptune are pr...
The solar system has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. There are five officially recognized dwarf planets in our solar system: Ceres, Pluto, Haumea, Makemake, and Eris.
Jul 26, 2023 · There’s moons, asteroids, comets, rings, Kuiper Belt objects, craters. Because we’re humans, we want to name these things. It gives us a connection to the huge universe around us. Thousands of years from now, people are still going to be naming planets, as we continue to explore the world around us. [END VIDEO TRANSCRIPT] Full Episode List.
Our solar system includes the Sun, eight planets, five officially named dwarf planets, and hundreds of moons, and thousands of asteroids and comets. Our solar system is located in the Milky Way, a barred spiral galaxy with two major arms, and two minor arms.
Over 99.86% of the Solar System's mass is in the Sun and nearly 90% of the remaining mass is in Jupiter and Saturn. There is a strong consensus among astronomers [ e ] that the Solar System has at least nine dwarf planets: Ceres, Orcus, Pluto, Haumea, Quaoar, Makemake, Gonggong, Eris, and Sedna.
Oct 5, 2024 · The planets, in order of their distance outward from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Four planets—Jupiter through Neptune—have ring systems, and all but Mercury and Venus have one or more moons.
