The planets of the solar system as depicted by a nasa computer illustration orbits and sizes are not shown to scale credit nasa ever since the discovery of pluto in 1930 kids grew up learning . Nine planets solar system tour this website is an overview of the history mythology and current scientific knowledge of the planets moons and other objects in our solar system each page has our text and nasas images some have sounds and movies most provide references to additional related information. Our solar system is the subject of composer gustav holsts the planets which premiered 100 years ago on sept 29 1918 nasa wikimedia commons one hundred years ago a symphonic blockbuster was . Venus venus is the second planet in the solar system and is earths virtual twin in terms of size and mass with a mass of 48676x10 24 kg and a mean radius of about 6052 km it is
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