By Seymour Simon
Describes the origins, features, and way forward for the sunlight, planets, moons, asteroids, meteoroids, and comets.
Read Online or Download Our Solar System PDF
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Additional info for Our Solar System
But Pluto has an odd, stretched and tilted orbit, which brings it closer to the sun than Neptune for 20 out of every 250 years. and 1999, Pluto Pluto is So, between 1979 closer to the sun than Neptune. was discovered by Clyde Tombaugh, American astronomer, in February 1930. a young The planet remained undiscovered for many years because it is so far from Earth and less than two-thirds the size of Earth's moon. Pluto was named after the Greek and Roman god of the underworld. The smallest and coldest planet in the Solar System, Pluto appears to be an ice ball of methane and water mixed with rock, surrounded methane gas.
Ars is appears so bright in the night sky because It it is closer to us than any other planet except Venus. Because early it shines with a red color, Romans named it made the think of blood and war. So they the planet Mars, after their god of war. People once imagined that Mars was covered by straight, lines were dark lines. They thought giant canals built Martians. But in the 1970s, craft by that these intelligent unmanned space- from Earth reached Mars. This view of Mars was sent back from a Viking spacecraft.
The rings are made of chunks of an unknown black material spinning around Uranus 50 like lumps of coal on a merry-go-round. leptune is too far from Earth to be seen without a telescope. Galileo saw Neptune through scope but mistook it for a star. It was first his small tele- identified as a planet in 1846. Later the planet was named Neptune, after the Roman god of the sea. Neptune is just a bit smaller than Uranus. Neptune is a ringed gas planet with dark storms, giant hurricanes, and streaky white clouds of methane-ice that float thirty-five miles largest storm is big Earth.