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Which of the following statements about the rings of the four jovian planets is not true?
.All are made of individual particles of rock or ice that orbit in accord with Kepler's laws: inner ring particles orbiting faster, and outer ring particles orbiting slower. b.All have gaps and ringlets, probably due to gap moons, shepherd moons, and orbital resonances. c.All probably look much like they did when the solar system first formed. d.All the particle orbits are fairly circular, near their planet's equatorial plane.
How does Giovanni Schiaparelli discoveries affect us today?
From the Brera Observatory in Milan in the late 1800s, Schiaparelli mapped and named many of the major features of the Planet Mars -- and we still use those naming conventions today. He also mapped a network of what he called "canali" (or channels) on the surface of Red Planet. While later studies proved that these observations were the product of optical illusions, the mistranslation of his word as 'canals' into English lead to widespread speculation about the possibilty of extraterrestrial intelligent life. (So most late 19th and early 20th century tales of Martian invasions -- e.g., Wells' War of the Worlds -- owe a debt to Schiaparelli!) In addition, Schiaparelli contributed to the modern scientific understanding of the relationship between meteor showers and asteroids, and he made early observations regarding the orbits of binary stars and the orbital patterns of Mercury and Venus.
How long has the world been around for?
All current scientific evidence suggests that Earth has existed for approximately 4-5 billion years.Question's such as these will have different answers, simply because no one knows.
