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Neptune Power Point
Transcript of Neptune Power Point
Period 6 Neptune Name Symbol Discovery Features Distance Rotation and Revolution Composition The Romans named planets closest to the sun after their most important gods. Later, when telescopes were used, other planets were discovered. Astronomers decided to continue naming the Planets after Roman Gods. Neptune was named after the Roman god of the Sea.
The symbol for Neptune is a trident, or three-pronged fork. This is a weapon associated with the Roman god Neptune, and the Greek god Poseidon. So based on the name from which it is associated with, that's where it gets its symbol from On September 23, 1846, Astronomer Johann Galle pinpointed the planet Neptune through a telescope at the Berlin Observatory in 1846. Neptune is an outer planet, the eighth planet in our solar system. The average distance of Neptune from the sun is 2,795,084,800 miles or 4,498,252,900 kilometers. Because its orbit is elliptical, its distance from the sun changes depending on where it is in its orbit. The closest Neptune gets to the sun is 2,771,087,000 miles or 4,459,630,000 kilometers. The farthest it gets from the sun is 2,819,080,000 miles or 4,536,870,000 kilometers. Its diameter is about four times that of the Earth, which makes it the 4th largest planet. The bluish color of the adjacent image is, as for Uranus, because of methane in the atmosphere, which absorbs red light, leaving the light scattered from Neptune The surface gravity of Neptune is 1.14 times the gravity on Earth. In other words, if you could actually walk on Neptune, you would feel only a little heavier than if you were walking on Earth. If you weighed 100 kg on Earth, you would weight 114 k. Neptune takes 16 hours, 6 minutes and 36 seconds to rotate once on its axis. That's about 2/3rds of an earth day. It takes 164 Years, 288 days, 13.0 hours to complete one revolution. Neptune consists primarily of 80% hydrogen and 19% helium. In smaller amounts, it also consists of water, methane, ammonia, and other compounds that can form ice in our solar system's temperatures. Atmosphere The atmosphere of Neptune is similar to all the large planets in the Solar System; it mostly consists of hydrogen and helium, with trace amounts of methane, water, ammonia and other ices. But unlike the other gas planets in the Solar System, Neptune's atmosphere has a larger proportion of the ices. It's the methane in the plant's upper atmosphere that gives it its bright blue color. Weather Neptune is the most distant planet from the Sun, with temperatures that plunge down to 55 Kelvin, or -218 degrees Celsius. You would think that a planet that cold would be frozen and locked down, with very little weather. But you’d be very wrong. In fact, the weather on Neptune is some of the most violent weather in the Solar System. Rings Neptune has several faint rings around it. There are three main rings which are very thin and dark. The rings are made up of small rocks and dust. Neptune's rings are not the same thickness all around. There are areas of the rings which are much thicker than other areas of the rings. These thicker parts are called ring arcs. Some of these ring arcs are also twisted. Because Neputune's rings are so dark and faint, they were not discovered until the 1980s. At the current count, Neptune has 13 moons. The largest of Neptune’s moons is Triton, which was discovered by William Lassell just 17 days after Neptune itself was discovered Moons Exploration Neptune has been visited by only one spacecraft, Voyager 2 on Aug 25 1989. Much of we know about Neptune comes from this single encounter. But fortunately, recent ground-based and HST observations have added a great deal, too. Important facts 1. Neptune is the most distant planet 2. Neptune is the smallest of the gas giants 3. Neptune’s surface gravity is almost Earthlike