PLANETS 

• The order of the planets from closest to the Sun outwards is; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and finally Neptune. The largest planet in the solar system is Jupiter, followed by Saturn, Uranus, Neptune, Earth, Venus, Mars with the smallest being Mercury.
• A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.
• Mercury is hot, but not too hot for ice. ...
• Venus doesn't have any moons, and we aren't sure why. ...
• Mars had a thicker atmosphere in the past. ...
• Jupiter is a great comet catcher. ...
• No one knows how old Saturn's rings are. ...
• Uranus is more stormy than we thought. ...
• Neptune has supersonic winds.