Thesunlies at the heart of the solar system, where it is by far the largest object. It holds 99.8 percent of the solar system's mass and is roughly 109 times the diameter of the Earth — about one million Earths could fit inside thesun. ... Thesunis one of more than 100 billion stars in the Milky Way
Mercury
I Mercuryis the smallest planet in our solar system. It's just a little bigger than Earth's moon. ... Along with Venus, Earth, and Mars,Mercuryis one of the rocky planets.
Venus
Venusis the secondplanetfrom the Sun, and is Earth's closest neighbor in the solar system.Venusis the brightest object in the sky after the Sun and the Moon, and sometimes looks like a bright star in the morning or evening sky. Theplanetis a little smaller than Earth, and is similar to Earth inside
Earth
Earth, our home, is the thirdplanetfrom the sun. It's the onlyplanetknown to have an atmosphere containing free oxygen, oceans of water on its surface and, of course, life.Earthis the fifth largest of theplanetsin the solar system. ... About a fifth ofEarth'satmosphere consists of oxygen, produced by plants.
Mars
Marsis the fourthplanetfrom the Sun and the second-smallestplanetin the Solar System after Mercury. ...Marsis a terrestrialplanetwith a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the valleys, deserts, and polar ice caps of Earth
Jupiter
Jupiteris the fifthplanetfrom the Sun and the largest in the Solar System. It is a gas giant with a mass one-thousandth that of the Sun, but two-and-a-half times that of all the otherplanetsin the Solar System combined.
Saturn
Saturnis the sixthplanetfrom the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine times that of Earth. It only has one-eighth the average density of Earth; however, with its larger volume,Saturnis over 95 times more massive
Uranus
Uranusis the seventhplanetfrom the Sun. It has the third-largestplanetaryradius and fourth-largestplanetarymass in the Solar System.Uranusis similar in composition to Neptune, and both have bulk chemical compositions which differ from that of the larger gas giants Jupiter and Saturn.
Neptune
Neptuneis the eighth and farthest knownplanetfrom the Sun in the Solar System. In the Solar System, it is the fourth-largestplanetby diameter, the third-most-massiveplanet, and the densest giantplanet.Neptuneis 17 times the mass of Earth, slightly more massive than its near-twin Uranus
