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18 relations: Arlo U. Landolt, Centre de données astronomiques de Strasbourg, Don Winget, Epoch (astronomy), Gravity wave, Hercules (constellation), HL Tau 76, Hydrogen, International Celestial Reference System, Jesse L. Greenstein, Lowell Observatory, Northern Hemisphere, Proper motion, Pulsating white dwarf, Star, Variable star, Variable star designation, White dwarf.
Arlo U. Landolt
Arlo Udell Landolt (born September 29, 1935) is an American astronomer.
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Centre de données astronomiques de Strasbourg
The Centre de Données astronomiques de Strasbourg (CDS; English translation: Strasbourg Astronomical Data Center) is a data hub which collects and distributes astronomical information.
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Don Winget
Don Winget is the Harlan J. Smith Centennial Professor in Astronomy at the University of Texas.
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Epoch (astronomy)
In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.
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Gravity wave
In fluid dynamics, gravity waves are waves generated in a fluid medium or at the interface between two media when the force of gravity or buoyancy tries to restore equilibrium.
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Hercules (constellation)
Hercules is a constellation named after Hercules, the Roman mythological hero adapted from the Greek hero Heracles.
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HL Tau 76
HL Tau 76 is a variable white dwarf star of the DAV (or ZZ Ceti) type.
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Hydrogen
Hydrogen is a chemical element with symbol H and atomic number 1.
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International Celestial Reference System
The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).
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Jesse L. Greenstein
Jesse Leonard Greenstein (October 15, 1909 – October 21, 2002) was an American astronomer.
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Lowell Observatory
Lowell Observatory is an astronomical observatory in Flagstaff, Arizona, United States.
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Northern Hemisphere
The Northern Hemisphere is the half of Earth that is north of the Equator.
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Proper motion
Proper motion is the astronomical measure of the observed changes in the apparent places of stars or other celestial objects in the sky, as seen from the center of mass of the Solar System, compared to the abstract background of the more distant stars.
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Pulsating white dwarf
A pulsating white dwarf is a white dwarf star whose luminosity varies due to non-radial gravity wave pulsations within itself.
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Star
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
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Variable star
A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates.
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Variable star designation
Variable stars are designated using a variation on the Bayer designation format of an identifying label (as described below) combined with the Latin genitive of the name of the constellation in which the star lies.
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White dwarf
A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter.
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EGGR 239, V777 Her, V777 Herculis.
