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The largest moon of saturn and one of the largest

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The largest moon of Saturn and one of the largest moons in the solar system, ________ is larger than Mercury and Pluto. Explanation: Titan. Titan has a planet-like atmosphere which is denser than Earth's atmosphere, which has made it very difficult to look at the surface. Recent missions to Titan have revealed that methane in liquid form rains from the skies and even forms stable bodies of liquid on the surface--the only place in the solar system other than Earth where stable bodies of liquid are known to exist. Discovered accidentally on March 13, 1781 by William Herschel, _____________ was studied for several months and found to be a new planet. Explanation: Uranus. Uranus has twenty-seven satellites and is named after the father of Saturn. It is the coldest planet in our solar system. It has an extreme axial tilt of 98 degrees, meaning that while the rest of the planets are closer to an upright position, Uranus is laying on its side.
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Whereas Uranus was discovered quite by accident, ____________ was found as the result of mathematical prediction. Detailed Explanation: Neptune. Through mathematical calculations and observance of the orbit of Uranus, it was determined that there was another planet that was affecting the angle of its orbit. Knowing where and when to look for this new planet was based on the calculations of John Couch Adams and Sir George Airy. While originally classified as a planet, __________ is now considered the largest body of a distinct region in the solar system called the Kuiper belt. Explanation: Pluto. It is composed primarily of rock and ice and is relatively small. From its discovery in 1930 until 2006, Pluto was classified as the ninth planet. However, the discovery of many similar objects in the outer solar system changed Pluto's classification to that of a dwarf planet and it was numbered as a minor planet. Note that that same region on the outer edges of our solar system is where comets are thought to be born. In medieval Europe, ___________ were usually regarded as poisonous vapors in the Earth's atmosphere and as bad omens, making them the most superstitiously feared of any astronomical object. Explanation: Comets. Comets slowly shift their positions in the sky from night to night, remaining visible for periods that range from a few days to a few months and appear at unpredictable times. Below is a pic of Comet Hyakutake in 1996:
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The calculations relating to the orbits of comets led to the discovery by Edmund ____________ that the same comet could be returning at intervals of about 75 or 76 years. Explanation: Halley. While Mr. Halley's life did not extend long enough for him to verify his discovery, his calculations were used and his predictions confirmed. The comet was named Halley's Comet in honor of the man who first recognized it to be a permanent member of the solar system. Subsequent investigation has shown that Halley's comet has been observed and recorded on every passage near the sun at intervals of from 74 to 79 years since 240 B.C.
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