R. Brent Tully
Encyclopedia
R. Brent Tully is an astronomer
Astronomer
An astronomer is a scientist who studies celestial bodies such as planets, stars and galaxies.Historically, astronomy was more concerned with the classification and description of phenomena in the sky, while astrophysics attempted to explain these phenomena and the differences between them using...

 at the Institute for Astronomy
Institute for Astronomy
The Institute for Astronomy is a research unit within the University of Hawaii system, led by Günther Hasinger as Director. IfA main headquarters are located at 2680 Woodlawn Drive in Honolulu, Hawaii, , on the University of Hawaii at Mānoa campus. Additional facilities are located at Pukalani,...

 in Honolulu, Hawaii
Hawaii
Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...

.

Tully's specialty is astrophysics
Astrophysics
Astrophysics is the branch of astronomy that deals with the physics of the universe, including the physical properties of celestial objects, as well as their interactions and behavior...

 of galaxies
Galaxy
A galaxy is a massive, gravitationally bound system that consists of stars and stellar remnants, an interstellar medium of gas and dust, and an important but poorly understood component tentatively dubbed dark matter. The word galaxy is derived from the Greek galaxias , literally "milky", a...

. He, along with J. Richard Fisher
J. Richard Fisher
J. Richard Fisher is an astronomer at the National Radio Astronomy Observatory at Charlottesville, VA. He received his Ph.D. in Astronomy from the University of Maryland, College Park and his B.S. in Physics from the Pennsylvania State University.Fisher, along with R...

, proposed the now-famous Tully-Fisher relation
Tully-Fisher relation
In astronomy, the Tully–Fisher relation, published by astronomers R. Brent Tully and J. Richard Fisher in 1977, is an empirical relationship between the intrinsic luminosity of a spiral galaxy and its velocity width...

 in a paper, A New Method of Determining Distances to Galaxies, published in Astronomy and Astrophysics
Astronomy and Astrophysics
* Astronomy and Astrophysics has a 2010 impact factor of 4.410.-See also:*The Astronomy and Astrophysics Review‎*Advanced Satellite for Cosmology and Astrophysics*Astronomy & Geophysics*Astronomical Journal*Astrophysical Journal...

, Vol. 54, No. 3, in February, 1977. He also published the book The Nearby Galaxies Catalog in 1988 with 3D locations for the closest 68,000 galaxies to Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...

. This data form a cube
Cube
In geometry, a cube is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex. The cube can also be called a regular hexahedron and is one of the five Platonic solids. It is a special kind of square prism, of rectangular parallelepiped and...

 of galaxies within an area of 700 million light years centered on Earth. A visual navigable representation of this index can be found in the planetarium
Planetarium
A planetarium is a theatre built primarily for presenting educational and entertaining shows about astronomy and the night sky, or for training in celestial navigation...

 computer software
Computer software
Computer software, or just software, is a collection of computer programs and related data that provide the instructions for telling a computer what to do and how to do it....

 Starry Night Pro
Starry Night (planetarium software)
Starry Night is commercial planetarium software, available for Mac OS X, Microsoft Windows and for the iphone. Starry Night focuses heavily on providing attractive, realistic imagery, although recent versions have also increasingly targeted the amateur astronomy community with features like...

, where the data is called the Tully Database. Within this database is what R. Brent Tully calls the Pisces-Cetus Supercluster Complex
Pisces-Cetus Supercluster Complex
The Pisces-Cetus Supercluster Complex is a complex of galaxy superclusters or galaxy filament that includes the Virgo Supercluster .-Discovery:...

.

See also

  • Large-scale structure of the cosmos
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