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INFO: Full form for GRB is Gamma Ray Bursts in Space Science category
GRB also has other full forms in other categories mentioned below.

In gamma-ray astronomy, gamma-ray bursts (GRBs) are immensely energetic explosions that have been observed in distant galaxies. They are the brightest and most energetic electromagnetic events known to occur in the universe. Bursts can last from ten milliseconds to several hours. After an initial flash of gamma rays, a longer-lived "afterglow" is usually emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, microwave and radio).

The intense radiation of most observed GRBs is thought to be released during a supernova or superluminous supernova as a high-mass star implodes to form a neutron star or a black hole.

A subclass of GRBs (the "short" bursts) appear to originate from the merger of binary neutron stars. The cause of the precursor burst observed in some of these short events may be the development of a resonance between the crust and core of such stars as a result of the massive tidal forces experienced in the seconds leading up to their collision, causing the entire crust of the star to shatter.

The sources of most GRBs are billions of light years away from Earth, implying that the explosions are both extremely energetic (a typical burst releases as much energy in a few seconds as the Sun will in its entire 10-billion-year lifetime) and extremely rare (a few per galaxy per million years). All observed GRBs have originated from outside the Milky Way galaxy, although a related class of phenomena, soft gamma repeater flares, are associated with magnetars within the Milky Way. It has been hypothesized that a gamma-ray burst in the Milky Way, pointing directly towards the Earth, could cause a mass extinction event.

GRBs were first detected in 1967 by the Vela satellites, which had been designed to detect covert nuclear weapons tests; this was declassified and published in 1973. Following their discovery, hundreds of theoretical models were proposed to explain these bursts, such as collisions between comets and neutron stars. Little information was available to verify these models until the 1997 detection of the first X-ray and optical afterglows and direct measurement of their redshifts using optical spectroscopy, and thus their distances and energy outputs. These discoveries, and subsequent studies of the galaxies and supernovae associated with the bursts, clarified the distance and luminosity of GRBs, definitively placing them in distant galaxies.

INFO: Full form for GCF is Ground Communications Facility in Space Science category
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INFO: Full form for NRS is New Revised Standard in Space Science category
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INFO: Full form for NRS is Nonconformance Reporting System in Space Science category
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In incompressible fluid dynamics dynamic pressure (indicated with q {\displaystyle q} , or Q, and sometimes called velocity pressure) is the quantity defined by:

where (using SI units):

It can be thought of as the fluid's kinetic energy per unit volume.

For incompressible flow, the dynamic pressure of a fluid is the difference between its total pressure and static pressure. From Bernoulli's law, dynamic pressure is given by

where p 0 {\displaystyle p_{0}} and p s {\displaystyle p_{\text{s}}} are the total and static pressures, respectively.

INFO: Full form for Q is Pitch Rate (angular Rate) in Space Science category
Q also has other full forms in other categories mentioned below.

INFO: Full form for Q is Alpha Pitch Dynamic Pressure in Space Science category
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Quality may refer to:

INFO: Full form for Q is Quite in Space Science category
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INFO: Full form for ODF is Orbit Determination Facility in Space Science category
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INFO: Full form for OA is Office of Applications (now Osta) in Space Science category
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INFO: Full form for LWS is Left Wheel Speed in Space Science category
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INFO: Full form for LWS is Light Warning Sensor in Space Science category
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INFO: Full form for LWS is Local Weather Service in Space Science category
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INFO: Full form for LWS is Left Wing Station in Space Science category
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INFO: Full form for LWS is Lightning Warning System in Space Science category
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INFO: Full form for LSU is Life Support Umbilical in Space Science category
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Line, lines, The Line, or LINE may refer to:

INFO: Full form for RDA is Remote Data Access in Space Science category
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INFO: Full form for RDA is Resident Data Area in Space Science category
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INFO: Full form for OA is Operational Aft (dsc Or Mom) in Space Science category
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Overalls, also called bib-and-brace overalls or dungarees, are a type of garment usually used as protective clothing when working. The garments are commonly referred to as a "pair of overalls" by analogy with "pair of trousers".

Overalls were originally made of denim, but they can also be made of corduroy or chino cloth. Overalls were invented in the 1890s by Levi Strauss and Jacob W. Davis at Levi Strauss & Co., but they went through an evolution to reach their modern form. Initially only used for protective clothing in work settings, they have become a garment of high fashion as "potential cult items". Overalls have been trending recently and have been prevalent in streetwear. Many high fashion brands have released their own spin on overalls.

INFO: Full form for OA is Operations Agreement in Space Science category
OA also has other full forms in other categories mentioned below.