{{current_slide_index}} / {{total_slide_count}} The Sun is a 4.5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium – at the center of our solar system. It’s about 150 million kilometers from Earth and it’s our solar system’s only star. learn more sun source of life age 4.5 bilion years star Type Yellow Dwarf Radius 696,340 kilometers temperature 5,500 degrees Celsius {{current_slide_index}} / {{total_slide_count}} The smallest planet in our solar system and nearest to the Sun, Mercury is only slightly larger than Earth's Moon. Mercury is the fastest planet, zipping around the Sun every 88 Earth days. learn more Length of Year 88 Earth Days Planet Type Terrestrial Radius 2,439 kilometers distance from sun 50,784,911 km mercury hot and cold {{current_slide_index}} / {{total_slide_count}} Venus is a terrestrial planet and is sometimes called Earth's "sister planet" because of their similar size, mass, proximity to the Sun, and bulk composition. It is radically different from Earth in other respects. learn more venus the Evening Star Length of Year 225 Earth Days Planet Type Terrestrial Radius 6,051 kilometers distance from sun 107,480,968 km {{current_slide_index}} / {{total_slide_count}} Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large amounts of water can be found throughout the Solar System, only Earth sustains liquid surface water. learn more Length of Year 365 Earth Days Planet Type Terrestrial Radius 6,371 kilometers distance from sun 147,295,031 km earth home sweet home {{current_slide_index}} / {{total_slide_count}} Mars is a terrestrial planet with a thin atmosphere, with surface features reminiscent of the impact craters of the Moon, and the valleys, deserts and polar ice caps of Earth. learn more mars the red planet Length of Year 687 Earth Days Planet Type Terrestrial Radius 3,390 kilometers distance from sun 224,894,231 km {{current_slide_index}} / {{total_slide_count}} Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a gas giant with a mass more than two and a half times that of all the other planets in the Solar System combined learn more jupiter the king Length of Year 4,333 Earth Days Planet Type Gas Giant Radius 71,492 kilometers distance from sun 746,122,626 km {{current_slide_index}} / {{total_slide_count}} Saturn is the sixth planet from the Sun and the second-largest planet in our solar system. Saturn is not the only planet to have rings, but none are as spectacular or as complex as Saturn's. Saturn also has dozens of moons. learn more saturn The Ringed One Length of Year 10,759 Earth Days Planet Type Gas Giant Radius 58,232 kilometers distance from sun 147,295,031 km {{current_slide_index}} / {{total_slide_count}} The seventh planet from the Sun with the third largest diameter in our solar system, Uranus is very cold and windy. It is surrounded by 13 faint rings and 27 small moons as it rotates at a nearly 90-degree angle from the plane of its orbit. learn more Length of Year 30.687 Earth Days Planet Type Ice Giant Radius 25,362 kilometers distance from sun 2,935,484,463 km uranus SEVENTH WANDERER {{current_slide_index}} / {{total_slide_count}} Neptune is the eighth and farthest-known Solar planet from the Sun. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. learn more neptune Way Out There Length of Year 165 Earth Days Planet Type Ice Giant Radius 24,622 kilometers distance from sun 4,475,931,034 km next prev