i have to write a 5 paragraph on pluto......?

Question

so i need 3 ideas that would be easy to persuade the reader that pluto is not a planet.

P.S. i am only in 7th grade so dont make it to complicated

Answer 1

Pluto orbits beyond the orbit of Neptune (usually). It is much smaller than any of the official planets and now classified as a "dwarf planet". Pluto is smaller than seven of the solar system's moons (the Moon, Io, Europa, Ganymede, Callisto, Titan and Triton).

orbit: 5,913,520,000 km (39.5 AU) from the Sun (average)
diameter: 2274 km
mass: 1.27e22 kg
In Roman mythology, Pluto (Greek: Hades) is the god of the underworld. The planet received this name (after many other suggestions) perhaps because it's so far from the Sun that it is in perpetual darkness and perhaps because "PL" are the initials of Percival Lowell.

Pluto was discovered in 1930 by a fortunate accident. Calculations which later turned out to be in error had predicted a planet beyond Neptune, based on the motions of Uranus and Neptune. Not knowing of the error, Clyde W. Tombaugh at Lowell Observatory in Arizona did a very careful sky survey which turned up Pluto anyway.

After the discovery of Pluto, it was quickly determined that Pluto was too small to account for the discrepancies in the orbits of the other planets. The search for Planet X continued but nothing was found. Nor is it likely that it ever will be: the discrepancies vanish if the mass of Neptune determined from the Voyager 2 encounter with Neptune is used. There is no Planet X. But that doesn't mean there aren't other objects out there, only that there isn't a relatively large and close one like Planet X was assumed to be. In fact, we now know that there are a very large number of small objects in the Kuiper Belt beyond the orbit of Neptune, some roughly the same size as Pluto.

Pluto has not yet been visited by a spacecraft. Even the Hubble Space Telescope can resolve only the largest features on its surface (left and above). A spacecraft called New Horizons was launched in January 2006. If all goes well it should reach Pluto in 2015.

Fortunately, Pluto has a satellite, Charon. By good fortune, Charon was discovered (in 1978) just before its orbital plane moved edge-on toward the inner solar system. It was therefore possible to observe many transits of Pluto over Charon and vice versa. By carefully calculating which portions of which body would be covered at what times, and watching brightness curves, astronomers were able to construct a rough map of light and dark areas on both bodies.

In late 2005, a team using the Hubble Space Telescope discovered two additional tiny moons orbiting Pluto. Provisionally designated S/2005 P1 and S/2005 P2, they are now known as Nix and Hydra. They are estimated to be between 60 and 200 kilometers in diameter.

Pluto's radius is not well known. JPL's value of 1137 is given with an error of +/-8, almost one percent.


well i hope that it might help u but dont worry ok bye!

Answer 2

Pluto (IPA: BrE /ˈpluːtəʊ/, AmE /ˈplutoʊ/), also designated 134340 Pluto (see minor planet names), is the second-largest known dwarf planet in the Solar System and the tenth-largest body observed directly orbiting the Sun. Originally considered a planet, Pluto has since been recognised as the largest member of a distinct region called the Kuiper belt. Like other members of the belt, it is primarily composed of rock and ice and is relatively small; approximately one-fifth the mass of the Earth's Moon and one-third its volume. Indeed, Pluto is smaller than seven of the Solar System's natural satellites. Pluto has an eccentric orbit that takes it from 29 to 49 AU (4.3 to 7.3 billion km) from the Sun, and is highly inclined with respect to the planets. As a result, Pluto occasionally comes closer to the Sun than the planet Neptune. Pluto and its largest satellite, Charon, are often considered a binary system because they are closer in size than any of the other known celestial pairs in the Solar System, and because the barycentre of their orbits does not lie within either body.[3] However, the International Astronomical Union (IAU) has yet to formalise a definition for binary dwarf planets, and until it passes such a ruling, Charon remains a moon of Pluto.[4] Pluto has two smaller moons, Nix and Hydra, discovered in 2005.[5]. From the time of its discovery in 1930 until 2006, Pluto was considered the Solar System's ninth planet. In the late 20th and early 21st centuries however, many objects similar to Pluto were discovered in the outer solar system, most notably the trans-Neptunian object Eris, which is slightly larger than Pluto. On August 24, 2006 the IAU defined the term "planet" for the first time. This definition excluded Pluto from planethood, and reclassified it under the new category of dwarf planet along with Eris and Ceres.[6] After the reclassification, Pluto was added to the list of minor planets and given the number 134340.[7][8]

Answer 3

because it is so small it is now considered a dwarf planet. A full-fledged planet is an object that orbits the sun and is large enough to have become round doe to the force of its own gravity, A planet has to dominate the neighborhood around its orbit. Pluto does not dominate its neighborhood. Bodies the dominate their neighborhoods"sweep up" clearing a path along their orbits. Pluto's orbit is some what untidy.

Answer 4

http://news.nationalgeographic.com/news/2006/08/060824-pluto-planet.html

Read the national geographic explanation and it will probably give you the 3 ideas you need.

Answer 5

3 ideas? 5 paragraphs? come on! piece of cake. look it up.