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Learn about the nine planets, their moons, the sun, stars, galaxies and more with fun facts, questions and games. This website is kid-friendly and easy to understand for children who are interested in space.
- Earth Facts for Kids - Interesting Facts about Planet Earth
- Neptune Facts for Kids - Interesting Facts about Planet Neptune
- Mars Facts for Kids - Interesting Facts about Planet Mars
- Uranus Facts for Kids - Interesting Facts about Planet Uranus
- Jupiter Facts for Kids - Interesting Facts about Planet Jupiter
- Solar System Facts for Kids - Interesting Facts about the Solar System
- Key Facts & Summary
- Terrestrial Planets Sizes
- Terrestrial Planets Composition
- Gas Giants Sizes
- Gas Giants Composition
- Ice Giants Sizes
- Ice Giants Composition
- Fun Facts
- Trivia
- Did You Know?
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The biggest planets in the Solar System are the gas giants Jupiter and Saturn.Coming into second place, based on their size, are the ice giants Neptune and Uranus.In the third place are the terrestrial planets. Though they are the smallest, these planets are the only ones that have a surface. In order of size, they are Earth, Venus, Mars, and Mercury.A couple of years ago, Pluto was also considered a planet and was the ninth planet of the Solar System. However, Pluto is now considered a dwarf planet.The terrestrial planets are the smallest in the Solar System. They are part of the inner solar system, being the closest to the Sun. The smallest terrestrial planet is Mercury. Mercury has a radius of 2.439 km / 1.516 mi and a diameter of 4.879 km / 3.032 mi. It is three times smaller than both Earth and Venus. Marsis the second-smallest planet, ha...
The terrestrial planets Mercury – Venus – Earth – Mars, are mostly made up of rock and metal. These planets are very heavy and move slowly. They have a solid surface, unlike the gas or ice giants. The terrestrial planets have a central metallic core composed mostly of iron, with a surrounding silicate mantle. These types of planets have common feat...
Both the gas giants and ice giants are part of the outer solar system, being the farthest from the Sun. They are separated from the terrestrial planets by the Asteroid Belt. The gas giants are the biggest planets in the solar system. Jupiterhas a mean radius of 69.911 kilometers / 43.440 miles, a diameter at the equator of around 142.984 km / 88.84...
The gas giants are mostly composed out of gases such as hydrogen, helium, and they presumably have a small rocky core in the center. Both gas giants have over 70 confirmed moons, a lot more than the ice giants. Though both ice giants and gas giants have planetary ring systems, the gas giant Saturn has by far the most prominent ring system ever seen...
Ice giants are also gas giants, but they are so named because they contain less gas and are compositionally different than the gas giants. They are the farthest planets from the Sun, and though they are considerably bigger than the terrestrial planets, they are also very small compared to the gas giants. The biggest ice giant is Uranushas a radius ...
The ice giants have an interior composition that consists primarily of what astronomers call ‘Ices’. These are compounds like water, methane, and ammonia, and are so-named presumably because they are solid at cold temperatures. They, like the gas giants, don’t have a true surface and presumably have a small core at the center. They indeed have the ...
Both Uranus and Neptune are blue to the presence of methane.Uranus and Venus rotate in the opposite direction than the other planets, from East to West. Uranus is also the only planet known to rotate on its side.The biggest moons of Uranus, all of them, have surface areas smaller than the continent of Australia.The original name proposed for Uranus was Georgian Sidus – which means Georgian Planet, in honor of King George II, however, the scientific community didn’t agreePlanets & Deities
Except for Earth, all the planets in the Solar System have been named after Greek and Roman gods and goddesses. Many have kept their names for hundreds of years, while the planets discovered after the invention of the telescope were named due to this tradition. Mercury was named after the Roman god of travel, because he was swift, and the planet moves very quickly around the Sun. Venus was named after the goddess of beauty and love, because it shines very brightly, almost like a star in the s...
Time on other Planets
Time goes by differently on the other planets. However, let’s measure them based on the concept of time here on Earth: one day on Earth is 23.9 hours – this is the time it takes for the planet to rotate once on its axis, one year on Earth is around 365,25 days – this is the period it takes for our planet to complete one trip around the Sun. With this in mind, here is how the other planets move: 1. Mercury – 1 day =59 Earth days; 1 year = 88 Earth days 1. Mars – 1 day = 24.6 hours; 1 year = 68...
Wind speeds on Neptune are among the fastest recorded in the Solar System. Some may reach up to 2.160 km / 1.324 mi per hour. They are five times stronger than the strongest winds on Earth. The wi...Neptune is the first planet to be discovered by the use of mathematical calculations and predictions.NASA has mapped the entire surface of Mercury.Many observations and analyses indicate that Mars was once very similar to Earth, having water, or even whole oceans. Many believe that Venus was also similar to Earth billions of years ago, having...Learn about the eight planets of the Solar System, their sizes, compositions, and features. Find out how they are grouped into terrestrial, gas, and ice giants, and what makes them unique.
Jul 17, 2019 · Learn fun facts and information about the eight planets in our solar system. Find out how they are different, what they are made of, and how we explore them.
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The solar system consists of our sun, which is a star, and all that its gravity affects. The planets in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. There are also dwarf planets such as Pluto, dozens of moons and millions of asteroids, comets and meteoroids of all shapes and sizes.
Explore the nine (or eight) planets of our solar system with easy-to-understand information for kids.
Learn about the eight planets in our solar system, their sizes, shapes, and orbits. Find out how scientists define a planet and why Pluto is no longer one.
May 6, 2024 · All About the Planets. Learn more about the planets in our solar system . explore; All About Mercury. The smallest planet in our solar system . explore; How Long Is One Day on Other Planets? Learn to make a graph with the answer! explore; How Many Moons Does Each Planet Have?
