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The Nine Planets is an encyclopedic overview with facts and information about mythology and current scientific knowledge of the planets, moons, and other objects in our solar system and beyond.
- Planets
The Planets of the Solar System Detailed information and...
- Solar System
The gas planets are composed primarily of hydrogen and...
- Objects
Latest Buyer’s Guides. How to choose your telescope...
- Questions
Frequently asked space questions to help you learn about...
- Buyer’s Guides
Space and Astronomy Product Reviews We review the best...
- Asteroids
These are all asteroids but also referred to as minor...
- Comets
Comet History. As of 1995, 878 comets have been cataloged...
- Constellations
The Nine Planets Constellation Facts & Information A...
- Planets
- Mercury
- Venus
- Earth
- Mars
- Jupiter
- Saturn
- Uranus
- Neptune
- Pluto
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Mercury is the smallest planetin the solar system, approximately 3000 miles (4850 km) in diameter, hardly larger than the moon. Despite being the smallest, it’s extremely dense. In fact, it’s the second densest planet after Earth. It’s also the closest planet to the sun, making it dangerous to explore. Mercury is 48 million miles from the earth. Si...
Venus is the second planet from the sun, and close to the earth, which is why it’s often referred to as our sister planet. It’s similar size to the Earth, about 7300 miles (12,000 kilometers). It’s nicknamed ‘’the morning star,” and thought to be the most inhabitable planet. Surface temperatures of Venus approach 900 degrees Fahrenheit, hot enough ...
Earth is a unique plant in the entire solar systembecause it teems with life, including millions of aquatic and terrestrial animal and plant species. It has active plate movement and humans also live on this planet. Earth’s core is almost entirely composed of iron. The inner core is solid, while the outer core is liquid. The next layer is called th...
It often called the red planet and nicknamed Roman god of war. Marsis a little bigger than the earth (about 6,790 kilometers in diameter). It has almost similar characteristics to earth such as mountain ranges, rolling plains, gigantic canyons, and volcanoes. Mars takes 687 days to orbit once around the sun, and its rotation speed is equal to the e...
Jupiter is the largest of all the planetsin the solar systems (142,980 kilometers in diameter) and more than 11 times wider than Planet Earth. Jupiter rotates around the sun once each 12 years. Despite its sheer size, Jupiter rotates on its axis pretty fast (in 9hrs and 19 min). Jupiter is made up of gas and liquid, and has no solid. It’s 90% hydro...
Saturn is the 6th planetaway from the sun. It’s one of the largest and brightest planets, nine times the size of the earth (120,536 kilometers), and orbited by numerous objects. Saturn is recognizable by its system of three rings. It orbits the sun in 12 years and rotates slightly more than 10 hours. Saturn has a relatively small and solid dense co...
Uranus is the 7th planetfrom the sun. It’s the third-largest planet in the solar system, 4.4 times the size of planet earth (51,118 kilometers). Uranus orbits the sun relatively slowly. It takes 84 years to complete a single orbit, rotating on its axis much faster than the earth (17 hours). Uranus can be seen with the naked eye and has a characteri...
Neptune is a little smaller than Uranus, and 17 times bigger than earth. It has a measurement of 49, 500 kilometers in diameter. Neptune is the 8th and furthest planet from the sun. It orbits the sun once each 165 years. It has almost similar structure and composition as Neptune, as its outer surface appears blue, and characterized by large dark bl...
Pluto is found 3.7 billion milesfrom the sun. It’s half the size of the earth’s moon, which is why it was renamed dwarf planet. Pluto is composed of chiefly rock and ice. The surface is made up of almost completely frozen methane, nitrogen, and carbon monoxide. It orbits the sun in 28 years and rotates in a duration of 6.4 days. It’s composed of on...
Learn about the nine planets that revolve around the sun, from Mercury to Neptune, and their characteristics, sizes, temperatures, and moons. Find out how they are different from each other and why Pluto is no longer considered a planet.
Mar 17, 2020 · Learn about the eight planets in our Solar System, their distances from the Sun, sizes, temperatures, atmospheres, moons, and more. Find out how Pluto was demoted from planet status and what are the dwarf planets.
Mar 29, 2023 · Explore the eight (or nine) planets of the solar system in order from nearest to the sun and discover the many wonders of our solar system along the way.
There is a strong consensus among astronomers that the Solar System has at least nine dwarf planets: Ceres, Orcus, Pluto, Haumea, Quaoar, Makemake, Gonggong, Eris, and Sedna. There are a vast number of small Solar System bodies, such as asteroids, comets, centaurs, meteoroids, and interplanetary dust clouds.
Dec 6, 2019 · The Planets of the Solar System Detailed information and facts about the eight planets and five dwarf planets in our solar system.
Jun 12, 2024 · Learn about the Sun and the eight planets that orbit around it, as well as their satellites, asteroids, comets, and other features. Find out how the solar system formed, where it is located, and what it contains.
