Aleksandr Kuznetsov was the expedition leader of the first undisputed team to set foot on the North Pole. [1] Other claimants, notably Frederick Cook (1908) and Robert Peary (1909) have been criticized for a lack of supporting logs, having no one to confirm sextant readings or other reasons.
Kuznetsov led the Sever-2 team of Soviet scientists who flew and landed three Lisunov Li-2s at the North Pole on April 23, 1948. [2] Soundings made by the team were the first to indicate an underwater mountain ridge beneath the ice and water at the North Pole. [3]
Magnetism is the class of physical attributes that occur through a magnetic field, which allows objects to attract or repel each other. Because both electric currents and magnetic moments of elementary particles give rise to a magnetic field, magnetism is one of two aspects of electromagnetism.
The North Pole, also known as the Geographic North Pole, Terrestrial North Pole or 90th Parallel North, is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface. It is called the True North Pole to distinguish from the Magnetic North Pole.
Polaris is a star in the northern circumpolar constellation of Ursa Minor. It is designated α Ursae Minoris and is commonly called the North Star or Pole Star. With an apparent magnitude that fluctuates around 1.98, it is the brightest star in the constellation and is readily visible to the naked eye at night. The position of the star lies less than 1° away from the north celestial pole, making it the current northern pole star. The stable position of the star in the Northern Sky makes it useful for navigation.
Roald Engelbregt Gravning Amundsen was a Norwegian explorer of polar regions. He was a key figure of the period known as the Heroic Age of Antarctic Exploration.
A magnetic field is a physical field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron, and attracts or repels other magnets. In addition, a nonuniform magnetic field exerts minuscule forces on "nonmagnetic" materials by three other magnetic effects: paramagnetism, diamagnetism, and antiferromagnetism, although these forces are usually so small they can only be detected by laboratory equipment. Magnetic fields surround magnetized materials, electric currents, and electric fields varying in time. Since both strength and direction of a magnetic field may vary with location, it is described mathematically by a function assigning a vector to each point of space, called a vector field.
In astronomy, axial tilt, also known as obliquity, is the angle between an object's rotational axis and its orbital axis, which is the line perpendicular to its orbital plane; equivalently, it is the angle between its equatorial plane and orbital plane. It differs from orbital inclination.
Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from Earth's interior out into space, where it interacts with the solar wind, a stream of charged particles emanating from the Sun. The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo.
A tipi or tepee is a conical lodge tent that is distinguished from other conical tents by the smoke flaps at the top of the structure, and historically made of animal hides or pelts or, in more recent generations, of canvas stretched on a framework of wooden poles. The loanword came into English usage from the Dakota and Lakota languages.
In electromagnetism, the magnetic moment or magnetic dipole moment is the combination of strength and orientation of a magnet or other object or system that exerts a magnetic field. The magnetic dipole moment of an object determines the magnitude of torque the object experiences in a given magnetic field. When the same magnetic field is applied, objects with larger magnetic moments experience larger torques. The strength of this torque depends not only on the magnitude of the magnetic moment but also on its orientation relative to the direction of the magnetic field. Its direction points from the south pole to north pole of the magnet.
Sir Ranulph Twisleton-Wykeham-Fiennes, 3rd Baronet, commonly known as Sir Ranulph Fiennes and sometimes as Ran Fiennes, is a British explorer, writer and poet, who holds several endurance records.
Frederick Albert Cook was an American explorer, physician and ethnographer, who is most known for allegedly being the first to reach the North Pole on April 21, 1908. A competing claim was made a year later by Robert Peary, though both men's accounts have since been fiercely disputed; in December 1909, after reviewing Cook's limited records, a commission of the University of Copenhagen ruled his claim unproven. Nonetheless, in 1911, Cook published a memoir of the expedition in which he maintained the veracity of his assertions. In addition, he also claimed to have been the first person to reach the summit of Denali, the highest mountain in North America, a claim which has since been similarly discredited. Though he may not have achieved either Denali or the North Pole, his was the first and only expedition where a United States national discovered an Arctic island, Meighen Island.
Lacrosse has its origins in a tribal game played by eastern Woodlands Native Americans and by some Plains Indians tribes in what is now the United States of America and Canada. The game was extensively modified by European settlers to create its current collegiate and professional form.
Edward Samoilovich Kuznetsov is a Soviet-Israeli dissident, refusenik, journalist, and writer. One of the leaders of the 1970 Dymshits–Kuznetsov hijacking affair, Kuznetsov's case drew international attention following his death sentence. As a result of global protests, his sentence was commuted to fifteen years' imprisonment.
The Battle of Raseiniai was a large tank battle that took place in the early stages of Operation Barbarossa, the German invasion of the Soviet Union. The battle was fought between the elements of the German 4th Panzer Group and the Soviet 3rd Mechanized Corps with the 12th Mechanised Corps, in Lithuania, 75 km (47 mi) north-west of Kaunas. The Red Army tried to contain and destroy the German troops that had crossed the Neman River but was unable to prevent them from advancing.
Farthest North describes the most northerly latitude reached by explorers, before the first successful expedition to the North Pole rendered the expression obsolete. The Arctic polar regions are much more accessible than those of the Antarctic, as continental land masses extend to high latitudes and sea voyages to the regions are relatively short.
The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is the southernmost point on Earth and lies antipodally on the opposite side of Earth from the North Pole, at a distance of 20,004 km in all directions. It is one of the two points where Earth's axis of rotation intersects its surface.
Polar aviation refers to aviation in the polar regions of the Earth. Specifically, one may speak of Arctic aviation and Antarctic aviation in the Arctic and Antarctic respectively.
Arctic exploration is the physical exploration of the Arctic region of the Earth. It refers to the historical period during which mankind has explored the region north of the Arctic Circle. Historical records suggest that humankind have explored the northern extremes since 325 BC, when the ancient Greek sailor Pytheas reached a frozen sea while attempting to find a source of the metal tin. Dangerous oceans and poor weather conditions often fetter explorers attempting to reach polar regions, and journeying through these perils by sight, boat, and foot has proven difficult.
The north magnetic pole, also known as the magnetic north pole, is a point on the surface of Earth's Northern Hemisphere at which the planet's magnetic field points vertically downward. There is only one location where this occurs, near the geographic north pole. The geomagnetic north pole is the northern antipodal pole of an ideal dipole model of the Earth's magnetic field, which is the most closely fitting model of Earth's actual magnetic field.