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The Origin of the Solar System
Five billion years ago a cloud of hot swirling dust and hydrogen gas gave birth to our Sun and planets. As the cloud spun and collapsed inwards it flattened into a central mass with a surrounding disk. Dust and gases in the disk formed small condensations each spinning about its own centre. Gravitation condensed and heated the central mass. Density increased dramatically and [nuclear] fusion began. Energy was released and our Sun flared into existence. The solar wind of the newly ignited Sun blew away leftover dust and gas in the vicinity of the inner condensations, leaving the rocky inner planets: Mercury, Venus, Earth and Mars. In the outer regions of the disk, the solar wind was weaker. The remaining dust and gas condensed into the larger gaseous planets: Jupiter, Saturn, Uranus and Neptune...........

solar system simulator
Welcome to the solar system simulator, a NASA/JPL/Caltech spyglass on the cosmos. Select from the options below to have the simulator create a color image of your favorite planet or satellite! copyright http://www.nasa.gov

 Viewpoint and Target

 Date and Time
On in the year  at GMT

 Field of View (choose one)
I want a field of view of  degree(s)
I want the body to take up percent of the image width

 Options (choose any)
-planet orbits -satellite orbits -constellation lines -extra brightness