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North Atlantic oscillation
The North Atlantic oscillation (NAO) is a fluctuation in atmospheric pressure between the Azores High and the Icelandic Low that shapes winter weather across Europe and eastern North America.
North Atlantic storm track
The North Atlantic storm track is the band where extratropical cyclones form and travel, downstream of the jet stream, bringing winter windstorms, heavy precipitation, and storm surges to western Europe.
North Celestial Pole
The north celestial pole is the fixed point in the northern sky where Earth's rotational axis intersects the celestial sphere, currently marked by the nearby star Polaris.
North Ecliptic Pole
The North Ecliptic Pole (NEP) is the point on the celestial sphere 90 degrees north of the ecliptic plane, in Draco, a major deep-field region for astronomy.
North Galactic Pole
The North Galactic Pole, or NGP, is the point on the celestial sphere 90 degrees above the Milky Way's plane, in the constellation Coma Berenices.
North magnetic pole
The north magnetic pole is the Northern Hemisphere point where Earth's magnetic field points vertically downward, first located in 1831 and drifting from Arctic Canada toward Siberia.
North Pacific High
The North Pacific High, or North Pacific Subtropical High (NPSH), is a semi-permanent high-pressure system over the North Pacific, strongest in summer between about 15°N and 45°N.
North Pacific Intermediate Water
North Pacific Intermediate Water (NPIW) is the low-salinity water mass of the North Pacific, a salinity minimum at depths of roughly 300–800 m, sourced mainly from the Sea of Okhotsk.
North Pacific Oscillation
The North Pacific Oscillation (NPO) is a recurring north-south seesaw in sea level pressure over the North Pacific, tied to shifts of the Aleutian low and to ENSO.
North Polar Spur
The North Polar Spur is a prominent ridge of radio and X-ray emission rising from the Galactic plane toward the North Galactic Pole, forming the brightest arm of Loop I.
North Sea flood of 1953
The North Sea flood of 1953, known in the Netherlands as the Watersnoodramp, killed 1,836 Dutch people and more than 300 in England on 1 February 1953.
Northeastern United States blizzard of 1978
The Northeastern United States blizzard of 1978, often called the Blizzard of '78, was a nor'easter that struck New England on February 5-7, 1978, paralyzing Boston for about a week.
Northern Cross
The Northern Cross is an unofficial asterism formed by Cygnus's brightest stars, including Deneb and Albireo, laid along the Milky Way and best seen around September.
Northern Endurance Partnership
The Northern Endurance Partnership is a bp, Equinor, and TotalEnergies joint venture transporting and storing carbon dioxide from Teesside and the Humber under the North Sea.
Northern Extended Millimeter Array
The Northern Extended Millimeter Array (NOEMA) is a millimeter radio interferometer of twelve 15-meter antennas on the Plateau de Bure in the French Alps, operated by IRAM since 1990.
Northern Lights (carbon capture and storage)
Northern Lights is a Norwegian joint venture of Equinor, Shell, and TotalEnergies that ships CO₂ from European capture sites and injects it about 2,600 meters under the North Sea seabed.
NorthStar Medical Radioisotopes
NorthStar Medical Radioisotopes, LLC is an American radiopharmaceutical company founded in 2006 in Beloit, Wisconsin, which in 2018 became the first US company in nearly 30 years to produce molybdenum-99 domestically.
Northwest Africa 7034
Northwest Africa 7034, nicknamed "Black Beauty", is a Martian meteorite found in Morocco's Sahara in 2011 that founded a new class of water-rich Martian breccias.
Norvaline
Norvaline is a non-proteinogenic amino acid, an unbranched isomer of valine that bacteria synthesize as a metabolic side product. It can be misincorporated into recombinant proteins and is sold as a dietary supplement.
Norwegian Continental Shelf
The Norwegian Continental Shelf is the seabed area under Norwegian jurisdiction in the North Sea, Norwegian Sea, and Barents Sea, and Western Europe's most important petroleum province.
Notation for differentiation
Notation for differentiation is the set of symbols used to write a derivative, including Leibniz's dy/dx, introduced in 1675, Lagrange's f'(x), and Newton's dot notation for time derivatives.
Notice to Mariners
A Notice to Mariners is a periodic publication issued by national hydrographic offices announcing corrections to nautical charts, such as new dangers to navigation and changes to aids to navigation.
Notker Rösch
Notker Rösch is a German theoretical chemist and emeritus professor at the Technical University of Munich, known for density functional studies of metal clusters and catalysis.
Nova
A nova, or stellar nova, is a thermonuclear eruption on a white dwarf star that brightens up to hundreds of thousands of times the Sun's luminosity.
NOvA (νe)
NOvA (NuMI Off-axis νe Appearance) is a Fermilab neutrino oscillation experiment that sends a muon-neutrino beam 810 km from Batavia, Illinois, to Ash River, Minnesota.
Nova-like variable
A nova-like variable is a cataclysmic variable star in which a white dwarf accretes matter at a high, steady rate, so the system shines continuously like an old nova.
NOVAC
NOVAC is a family of mobile electron linear accelerators built for intraoperative radiation therapy in the operating room; the original NOVAC7 of 1997 was the first designed worldwide.
NovaGold Resources
NovaGold Resources is a Vancouver, British Columbia gold development company whose principal asset is a majority interest in the Donlin Gold project, a large undeveloped deposit in southwestern Alaska.
Novel prediction
A novel prediction is an empirical consequence of a scientific theory not known or not used in constructing it, which philosophers argue confirms the theory more strongly than accommodation.
November
November (Nov.) is the eleventh month of the Gregorian calendar, with 30 days, named from Latin novem, "nine", for its position in the old Roman calendar.