North Pole

Coordinates: 90°N 0°W / 90°N -0°E / 90; -0

The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is (subject to the caveats explained below) defined as the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface. It should not be confused with the North Magnetic Pole.

The North Pole is the northernmost point on the Earth, lying diametrically opposite the South Pole. It defines geodetic latitude 90° North, as well as the direction of true north. At the North Pole all directions point south; all lines of longitude converge there, so its longitude can be defined as any degree value. Along tight latitude circles, counterclockwise is east and clockwise is west.

While the South Pole lies on a continental land mass, the North Pole is located in the middle of the Arctic Ocean amid waters that are almost permanently covered with constantly shifting sea ice. This makes it impractical to construct a permanent station at the North Pole (unlike the South Pole). However, the Soviet Union, and later Russia, constructed a number of manned drifting stations on a generally annual basis since 1937, some of which have passed over or very close to the Pole. Since 2002, the Russians have also annually established a base, Barneo, close to the Pole. This operates for a few weeks during early spring. Studies in the 2000s predicted that the North Pole may become seasonally ice-free because of Arctic ice shrinkage, with timescales varying from 2016 to the late 21st century or later.

North Pole (disambiguation)

North Pole may refer to:

Terrestrial, celestial and planetary North Poles

Physics

Trap Back

Trap Back is a mixtape by American rapper Gucci Mane, it was released on February 5, 2012. It includes guest appearances from Chilly Chill, Yo Gotti, Waka Flocka Flame, Rocko, Jadakiss, Future, and 2 Chainz. On mixtape website DatPiff, it has been certified 2x Platinum for being downloaded over 500k times.

Reception

Critical response

Robert Baker of XXL said "Through most of the tape, Gucci does exactly what we expect. He flips raps about flipping white, takes pills with some lady friends, and counts his green. Looking for something different from the Warner Bros. signee at this point is, though, seems foolish." Phillip Mlynar at HipHopDX said "At his best, Gucci cuts something of a ridiculous rap figure - this buffoonish persona is a virtue when he's dropping over-the-top crack rap boasts and flaunting his wealth. So when he spits over a sample of the Tetris theme song on the 2 Chainz-featured "Get It Back," his lines hit home at their cartoonish best; there's a marriage of light-heartedness between the beat and the words."

2430 A.D.

2430 A.D. is a science fiction short story by Isaac Asimov. It first appeared in the October 1970 issue of Think, the IBM house magazine, and was reprinted in Asimov's 1975 collection Buy Jupiter and Other Stories.

Early in 1970 the author was commissioned by Think to write a story based on a quotation by writer and social commentator J. B. Priestley:

Asimov, assuming that Think wanted a story that illustrated Priestley's quotation, crafted 2430 A.D. He selected the date because he calculated that at the then-current rate of human population growth, doubling every thirty-five years, that would be the year when the world's animal biomass would consist entirely of human beings. Asimov wrote the story on April 26, 1970 but it was rejected as Think had actually wanted a story that refuted the quotation. ("Well, they never said so," Asimov remarked later.) After Asimov wrote a second story that did refute the quotation, Think took the first story after all and published it in their October 1970 issue. The second story was later published in Analog magazine as The Greatest Asset. Both stories inspired by the Priestley quote were included in the 1975 collection Buy Jupiter and Other Stories.

0 (year)

Year zero does not exist in the Anno Domini (or Common Era) system usually used to number years in the Gregorian calendar and in its predecessor, the Julian calendar. In this system, the year 1 BC is followed by AD 1. However, there is a year zero in astronomical year numbering (where it coincides with the Julian year 1 BC) and in ISO 8601:2004 (where it coincides with the Gregorian year 1 BC) as well as in all Buddhist and Hindu calendars.

Historical, astronomical and ISO year numbering systems

Historians

The Anno Domini era was introduced in 525 by Scythian monk Dionysius Exiguus (c. 470–c. 544), who used it to identify the years on his Easter table. He introduced the new era to avoid using the Diocletian era, based on the accession of Roman Emperor Diocletian, as he did not wish to continue the memory of a persecutor of Christians. In the preface to his Easter table, Dionysius stated that the "present year" was "the consulship of Probus Junior [Flavius Anicius Probus Iunior]" which was also 525 years "since the incarnation of our Lord Jesus Christ". How he arrived at that number is unknown.

1987

1987 (MCMLXXXVII) was a common year starting on Thursday (dominical letter D) of the Gregorian calendar, the 1987th year of the Common Era (CE) and Anno Domini (AD) designations, the 987th year of the 2nd millennium, the 87th year of the 20th century, and the 8th year of the 1980s decade.

Events

January