Pluto is the ninth planet in the solar system. Discovered in 1930 and immediately classified as a planet, its status is currently under dispute. Pluto has an eccentric orbit that is highly inclined in respect to the other planets and takes it inside the orbit of Neptune. Its largest moon is Charon, discovered in 1978; two smaller moons were discovered in 2005. Pluto's astronomical symbol is a P-L monogram, ♇. This represents both the first two letters of the name Pluto and the initials of Percival Lowell ...

Including:

Pluto - Discovery and naming Pluto - Orbit Pluto - Physical characteristics
Pluto - Mass and size Pluto - Atmosphere Pluto - Appearance
Pluto - Pluto's moons
Pluto - Charon Pluto - The outer moons
Pluto - Exploration of Pluto Pluto - The Pluto debate
Pluto - Planet X? Pluto - Minor planet? Pluto - New discoveries
Pluto - Pluto in popular culture

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See also:

Pluto, Pluto - Discovery and naming, Pluto - Orbit, Pluto - Physical characteristics, Pluto - Mass and size, Pluto - Atmosphere, Pluto - Appearance, Pluto - Pluto's moons, Pluto - Charon, Pluto - The outer moons, Pluto - Exploration of Pluto, Pluto - The Pluto debate, Pluto - Planet X?, Pluto - Minor planet?, Pluto - New discoveries, Pluto - Pluto in popular culture

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Little is known about Pluto because of its great distance from Earth and because no exploratory spacecraft have visited Pluto yet. The Voyager 1 probe was originally intended to visit Pluto, but due to budget cuts and lack of interest — before the discovery of Pluto's moon, size, and atmosphere — the flyby was scrapped in order to facilitate a close flyby of Saturn's moon Titan. The first spacecraft to visit Pluto will be NASA's New Horizons, a mission led by the Southwest Research Institute and ...

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Pluto, Pluto - Discovery and naming, Pluto - Orbit, Pluto - Physical characteristics, Pluto - Mass and size, Pluto - Atmosphere, Pluto - Appearance, Pluto - Pluto's moons, Pluto - Charon, Pluto - The outer moons, Pluto - Exploration of Pluto, Pluto - The Pluto debate, Pluto - Planet X?, Pluto - Minor planet?, Pluto - New discoveries, Pluto - Pluto in popular culture

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Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. Unlike weight, the mass of something stays the same regardless of location. It is a central concept of classical mechanics and related subjects. Strictly speaking, there are three different quantities called mass: Inertial mass is a measure of an object's inertia: its resistance to changing its state of motion when a force is applied. An object with small inertial mass changes its motion more rea ...

Including:

Mass - Introduction Mass - Units of mass Mass - Inertial mass Mass - Gravitational mass Mass - Equivalence of inertial and gravitational masses Mass - Relativistic relation among mass energy and momentum

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The carat is a unit of mass used for gems, and equals 200 milligrams. The word derives from the Greek keration (fruit of the carob), via Arabic and Italian. Carob seeds were used as weights on precision scales because of their uniform size. In the distant past, different countries each had their own carat, roughly equivalent to a carob seed. Eventually, it was linked to the grain in the Troy pound system of measurement. Under this system the standard was about 205 milligrams. Metric countries used this measurement nonetheless in i ...

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The center of mass of an object is a point at which the object's mass can be assumed, for many purposes, to be concentrated. Center of mass - Example. For example, an object can balance on a point only if its center of mass is directly above the point. Alternatively, if you hang an object from a string, the object's center of mass will be directly below the string. Center of gravity, Centroid, Pappus's centroid theorem, Center of pressure Center ...

Including:

Center of mass - Example Center of mass - Comparison with center of gravity Center of mass - Definition Center of mass - More formulas Center of mass - Aeronautical significance Center of mass - Motion of the center of mass Center of mass - Examples Center of mass - Barycenter
Center of mass - Animations

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The critical mass of fissile material is the amount needed for a sustained nuclear chain reaction. The critical mass of a fissionable material depends upon the nuclear (e.g. the nuclear fission cross-section) and physical properties of the material (in particularly the density), its geometry (shape), and its purity, as well as whether it is surrounded by a neutron reflector or interrupted by an absorber. See also neutron radiation. An assembly in which a chain reaction is just possible is called critical, and is said to ...

Including:

Critical mass - Critical mass of a sphere Critical mass - Weapon design Critical mass - Criticality pathways tutorial

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Weapons of mass destruction (WMD) generally include nuclear, biological, chemical and, increasingly, radiological weapons. The term first arose in 1937 in reference to the mass destruction of Guernica, Spain, by aerial bombardment. Following the bombing of Hiroshima and Nagasaki, and progressing through the Cold War, the term came to refer more to non-conventional weapons. The terms ABC, NBC, and CBRN have been used synonymously with WMD, although nuclear weapons have the greatest capacity to cause mass destruction. The phrase entered popular usage in rel ...

Including:

Weapons of mass destruction - Historic use of the term WMD Weapons of mass destruction - Current definitions Weapons of mass destruction - Differences among WMD types Weapons of mass destruction - WMD use and control Weapons of mass destruction - Countries suspected of having Nuclear Weapons Weapons of mass destruction - National politics Weapons of mass destruction - Media coverage of WMD Weapons of mass destruction - Public perceptions of WMD Weapons of mass destruction - WMD in film music and humor

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Angular size is a measurement of how large or small something is using rotational measurement (degrees of arc, arc-minutes, and arc-seconds). It is useful for measuring things that are so far away that they appear two-dimensional. It is easy to understand angular size by imagining that you're standing some distance from some kind of large landmark, like the Golden Gate Bridge. Hold out your arm and point to one end of the bridge, then - without moving your arm with respect to your body - turn your body slightly so that y ...

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Critical Mass is an event held typically on the last Friday of every month in cities around the world, where bicyclists, skateboarders, roller bladers, roller skaters and other self-propelled people take to the streets en masse. Critical Mass has no leaders, and no goals other than to meet once every month and enjoy the security and companionship of riding, rolling and travelling through the city together. The one worldwide slogan, chanted by riders in probably all cities where the ride take place is: "We aren't blocking traffi ...

Including:

Critical Mass - Purpose Critical Mass - History and organization of the rides
Critical Mass - Origins Critical Mass - Structure Critical Mass - Corking
Critical Mass - Conflicts

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Disclaimer: The following entry is entirely intellectual knowledge by User:PbS; neither he nor any other person is known to have put this knowledge to practice, No claim of accuracy is made or implied. Use this info at your own risk. In order to size a wheel for an automobile, an owner needs to know a few fundamental things: The bolt pattern The diameter of the bolt circle The offset The size of the wheel The centerbore Wheel sizing - Bolt pattern. ...

Including:

Wheel sizing - Bolt pattern Wheel sizing - Bolt circle Wheel sizing - Lug nuts or bolts Wheel sizing - Offset Wheel sizing - Wheel size Wheel sizing - Centerbore

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Working mass is a mass against which a system operates in order to produce acceleration. All acceleration requires an exchange of momentum, which can be thought of as the "unit of movement". Momentum is related to mass and velocity, as given by the formula P = mv, where P is the momentum, m the mass, and v the velocity. The velocity of a body is easily changeable, but in most cases the mass is not, which makes it important. In rockets, the total ve ...

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A4 is a standard paper size, defined by the international standard ISO 216 as 210×297 mm (roughly 8.27×11.69 in). It is the normal size of paper for both domestic and business purposes in all countries except the United States, Mexico, Canada and the Philippines. See also. Paper size ...

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In Christian tradition, Black Mass is the name given to a ceremony supposedly celebrated during the Sabbath, which was a parody of the Christian Mass. Its main objective was the profanation of the host, although there is no agreement among authors on how hosts were obtained or profaned; the most common idea is that they were profaned by means of some ritual related to sexual practices. Authors also disagree o ...

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On the Sizes and Distances [of the Sun and Moon] is the only extant work written by Aristarchus of Samos, an ancient Greek astronomer who lived circa 310 BC - 230 BC. In this work, he calculates the sizes of the Sun and Moon, as well as their distances from the Earth in Earth radii. Aristarchus On the Sizes and Distances - Symbols. His method relied on several very difficult observations: The angle between the sun and moon when the moon is exactly half lit The apparent size of t ...

Including:

Aristarchus On the Sizes and Distances - Symbols Aristarchus On the Sizes and Distances - Half-lit Moon Aristarchus On the Sizes and Distances - Lunar eclipse Aristarchus On the Sizes and Distances - Results Aristarchus On the Sizes and Distances - Works cited

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The atomic mass of a chemical element (also known as the relative atomic mass or average atomic mass or atomic weight) is the average atomic mass of all the chemical element's isotopes as found in a particular environment, weighted by isotopic abundance. Periodic tables usually list these with reference to the local environment of Earth's crust and atmosphere. For artificial elements the nucleon count of the most stable is ...

Including:

Atomic mass - History

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Category: Orders of magnitude (mass) Other related archivesOrders of magnitude (mass)

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The innermost moon, Charon, was discovered by James Christy on 1978 June 22, nearly half a century after Pluto. Two outer moons were imaged by the Hubble Space Telescope Pluto Companion Search Team on 2005 May 15, and precovered from Hubble images taken in June 2002. The team has scheduled further Hubble observations for February 2006. Once the orbits are confirmed, the International Astronomical Union can consider names for the outer moons. Given the sensitivity of the Hubble images, and the fact that the entire region of space dominated by Pluto's gravitational field was imaged, Pluto is not expect ...

See also:

Pluto's natural satellites, Pluto's natural satellites - Pluto's satellite system, Pluto's natural satellites - Table of known moons

Read more here: » Pluto's natural satellites: Encyclopedia II - Pluto's natural satellites - Pluto's satellite system

Terry Pluto - Sports. The Greatest Summer: The Remarkable Story of Jim Bouton's Comeback to MLB, (1979) Earl of Baltimore, (1982) ISBN 0832901253 A Baseball Winter: The Off-Season Life of the Summer Game, (Jeffrey Neuman, Editor, 1986) ISBN 0025977601 Forty-Eight Minutes: A Night in the Life of the NBA, (Co-Written with Bob Ryan, 1989) ISBN 0025977709 Bull Session: An Up-Close Look at Michael Jordan and Courtside Stories About the Chicago Bu ...

See also:

Terry Pluto, Terry Pluto - Books, Terry Pluto - Sports, Terry Pluto - Religion, Terry Pluto - Edited by Terry Pluto

Read more here: » Terry Pluto: Encyclopedia II - Terry Pluto - Books

The overall structure of the spacecraft was to be an aluminium hexagonal bus with no deployable structures. Of the total 220 kg mass of the spacecraft, only about 7 kg would have consisted of science instruments. Power would have been provided by radioisotope thermal generators (RTGs) similar in design to those used on earlier missions (e.g., Galileo or Cassini). It was planned to use spare RTGs from Cassini. Communications would have been via a fixed, 1.47 m high-gain antenna employing an X-band uplink receiver and downlink transponder. Poi ...

See also:

Pluto Kuiper Express, Pluto Kuiper Express - Spacecraft and subsystems, Pluto Kuiper Express - Mission profile

Read more here: » Pluto Kuiper Express: Encyclopedia II - Pluto Kuiper Express - Spacecraft and subsystems