The Sun is by far the largest object in the solar system. It contains more than 99.8% of the total mass of the Solar System (Jupiter contains most of the rest). 3rd planet from sun; has an atmosphere that protects life & surface temp. That's true in the sense that there are many others similar to it. One day on Jupiter goes by in just 10 hours. With a radius of 3,959 miles, Earth is the fifth largest planet in our solar system, and it's the only one known for sure to have liquid water on its surface. 2nd planet from the sun Earth's sister planet Thick carbon dioxide atmosphere traps heat. the largest planet in our solar system. The star at the center of our solar system. Most people have at least heard about our solar system and the planets in it. a celestial body that orbits a star, is large enough to be round, and has cleared it's orbital path ... slow rotation, solid surface, no rings, few moons. One year on Jupiter is the same as 11.8 Earth years. 's that allow water to exist as a solid, liquid, & gas. Earth is the fourth smallest of the planets—though in terms of the rocky planets, it's the largest—but it's the most dense.Jupiter is the largest planet in the solar system, but it's Saturn—the solar system's second largest planet—that takes the … From the ringed goddess Saturn, to the lead-melting temperatures of Venus, to the mammoth-sized Jupiter, every planet comes with its own allure and we bet a really good mythological story behind it. The terrestrial planets or our solar system: Mercury, Venus, Earth & Mars (Image credit: Public domain) Mercury. Mercury. Even though it is a gas giant, its diameter is less than 10% of the Sun’s. earth. A Planet. The 4th planet from the sun; also known as the "Red Planet." It is a gaseous planet, but scientists believe that is has a solid core. But just what makes Jupiter so … Jupiter has rings, but they’re very hard to see. Our solar system is usually gone over in elementary school, so you might just need a refresher course about the planets in order in our solar system. As Io travels in its slightly elliptical orbit, Jupiter's immense gravity causes "tides" in the solid surface that rise 300 feet (100 meters) high on Io, generating enough heat for volcanic activity and to drive off any water. Jupiter's Neighbors If you’re fascinated by our solar system, then, you’re in luck. It is made mostly of hydrogen and helium. Saturn is the second-largest planet in the solar system. the smallest planet and the nearest to the sun. Jupiter has a very thick atmosphere. Jupiter is the biggest planet in the solar system, with four large moons and at least 75 other smaller ones. The planets in order from the sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and finally the dwarf planet Pluto.. Venus. Io's surface is covered by sulfur in different colorful forms. 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