25 relations: Addison-Wesley, Ancient Greek, Chromosphere, Convection cell, Corona, Cubic metre, Density, Granule (solar physics), H-alpha, Helium, Hydrogen, Kilogram, Kilometre, Max Planck Institute for Solar System Research, Metal, NASA, Neutron star, Optical depth, Plasma (physics), Solar flare, Star, Stefan–Boltzmann law, Sun, Sunspot, Wavelength.
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The Ancient Greek language includes the forms of Greek used in ancient Greece and the ancient world from around the 9th century BC to the 6th century AD.
The chromosphere (literally, "sphere of color") is the second of the three main layers in the Sun's atmosphere and is roughly 3,000 to 5,000 kilometers deep.
In the field of fluid dynamics, a convection cell is the phenomenon that occurs when density differences exist within a body of liquid or gas.
A corona (Latin, 'crown') is an aura of plasma that surrounds the Sun and other stars.
The cubic metre (in British English and international spelling as used by the International Bureau of Weights and Measures) or cubic meter (in American English) is the SI derived unit of volume.
The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.
Granules on the photosphere of the Sun are caused by convection currents (thermal columns, Bénard cells) of plasma within the Sun's convective zone.
H-alpha (Hα) is a specific deep-red visible spectral line in the Balmer series with a wavelength of 656.28 nm in air; it occurs when a hydrogen electron falls from its third to second lowest energy level.
Helium (from lit) is a chemical element with symbol He and atomic number 2.
Hydrogen is a chemical element with symbol H and atomic number 1.
The kilogram or kilogramme (symbol: kg) is the base unit of mass in the International System of Units (SI), and is defined as being equal to the mass of the International Prototype of the Kilogram (IPK, also known as "Le Grand K" or "Big K"), a cylinder of platinum-iridium alloy stored by the International Bureau of Weights and Measures at Saint-Cloud, France.
The kilometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: km; or) or kilometer (American spelling) is a unit of length in the metric system, equal to one thousand metres (kilo- being the SI prefix for). It is now the measurement unit used officially for expressing distances between geographical places on land in most of the world; notable exceptions are the United States and the road network of the United Kingdom where the statute mile is the official unit used.
The Max Planck Institute for Solar System Research (abbreviation: MPS; Max-Planck-Institut für Sonnensystemforschung) is a research institute in astronomy and astrophysics located in Göttingen, Germany, where it relocated in February 2014 from the nearby village of Lindau.
A metal (from Greek μέταλλον métallon, "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard when in solid state, opaque, shiny, and has good electrical and thermal conductivity.
The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.
A neutron star is the collapsed core of a large star which before collapse had a total of between 10 and 29 solar masses.
In physics, optical depth or optical thickness, is the natural logarithm of the ratio of incident to transmitted radiant power through a material, and spectral optical depth or spectral optical thickness is the natural logarithm of the ratio of incident to transmitted spectral radiant power through a material.
Plasma (Henry George Liddell, Robert Scott, A Greek English Lexicon, on Perseus) is one of the four fundamental states of matter, and was first described by chemist Irving Langmuir in the 1920s.
A solar flare is a sudden flash of increased Sun's brightness, usually observed near its surface.
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
The Stefan–Boltzmann law describes the power radiated from a black body in terms of its temperature.
The Sun is the star at the center of the Solar System.
Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas.
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.