Hyades


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Related to Hyades: Aldebaran

Hyades

(hī`ədēz), in astronomy, open star clusterstar cluster,
a group of stars near each other in space and resembling each other in certain characteristics that suggest a common origin for the group. Stars in the same cluster move at the same rate and in the same direction.
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 in the constellation Taurus, located immediately to the right of the bright star Aldebaran. The cluster is about 130 light-years from the earth. It consists of about 100 stars all moving in the same direction. Its shape is that of an oblate spheroid, with most of the stars lying within 20 light-years of the center. Most of the stars in this cluster are of spectral classspectral class,
in astronomy, a classification of the stars by their spectrum and luminosity. In 1885, E. C. Pickering began the first extensive attempt to classify the stars spectroscopically.
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 G and K and are average in size, with temperatures that are comparable to that of the sun. The nebular variable star T Tauri is part of this cluster. The Hyades is important as a fundamental calibration point in the distance scale of the universe. Because it is one of the closest of the open clusters, measurements of parallaxes of its stars as well as the relationship between the apparent and absolute magnitudes of some of its member stars yield similar distance results. In 1908 L. Boss discovered that the proper motions of all the Hyades stars were converging as an effect of perspective, and that their motions were really parallel. Once the convergent point for the cluster was established, the distance could be calculated. With the distance to this cluster known accurately, absolute magnitudes for its members could be determined. Thus the Hyades stars are used as calibration for similar stars in far more distant clusters.

Hyades,

in Greek mythology, nymphs; daughters of Atlas and Aethra. They cared for both Zeus and Dionysus as infants. In recognition of these services, they were placed among the stars of the constellation Taurus, where their rising and setting corresponded to the rainy seasons.

Hyades

(hÿ -ă-deez) An open cluster of over 200 stars in the constellation Taurus. It is the nearest open cluster, about 46 parsecs away, and is scattered over an area of about 6°. Its brightest members form a V-shaped group that is visible to the naked eye, with Aldebaran in the foreground (but not a member). Its age is about 600 million years.

Hyades

[′hī·ə‚dēz]
(astronomy)
A V-shaped open star cluster about 150 light-years from the sun, which appears in the constellation Taurus near the star Aldebaran.

Hyades

seven daughters of Atlas, entrusted with the care of the infant Dionysus. [Gk. Myth.: Howe, 134]
See: Nymph
References in periodicals archive ?
Although Aldebaran appears in the Hyades star cluster, it is actually a foreground star, only 68 light years distant.
The youth of the Hyades cluster--an estimated 600 million years old--also favored observations, Bryja says.
One of our goals when launching the TPTP Project was to expand the scope and adoption of the Eclipse Hyades Project, now TPTP.
The slender waxing lunar crescent is almost 6[degrees] left of Venus at nightfall on April 17th and within the Hyades 24 hours later.
To Orion's left, in Taurus, are two beautiful naked-eye open clusters: the Pleiades and the V-shaped Hyades.
Notice that Aldebaran seems to be part of a small, V-shaped pattern of dimmer stars: the leading lights of the sprawling Hyades cluster.
The stars, known as white dwarfs-small, dim remnants of stars once like the Sun-reside 150 light-years away in the Hyades star cluster, in the constellation of Taurus (The Bull).
Among the specific topics discussed are extreme coronal mass ejections in young low-mass stars, observations versus theory in low-mass eclipsing binaries, observations of late-type stars with the infrared spatial interferometer, the activity and rotation limit in the Hyades, and searching for ultra-cool objects at the limits of large-scale surveys.
Eddie Read Stakes Coral: 7-2 The Usual Q T, 4 Loup Breton, 5 Victor's Cry, Acclamation, 11-2 Crowded House, Enriched, 8 Hyades.
A good word can also be passed on for another Cecil Derby entrant, Hyades, in the Cheviot Asset Management Maiden Stakes.
Orion slowly rises in the east preceded by Taurus the Bull whose head is marked out by the V shaped Hyades cluster.
Using sophisticated detectors, Boesgaard and her students determined the lithium content of stars in several clusters, including the Hyades and the Pleiades, both found in the constellation Taurus.