The Virgo III Groups, Virgo III Cloud,
or the Virgo-Libra Cloud
is a
galaxy filament
In cosmology, galaxy filaments are the largest known structures in the universe, consisting of walls of galactic superclusters. These massive, thread-like formations can commonly reach 50 to 80 megaparsecs ()—with the largest found to date b ...
consisting of at least 13
galaxy group
A galaxy group or group of galaxies (GrG) is an aggregation of galaxies comprising about 50 or fewer gravitationally bound members, each at least as luminous as the Milky Way (about 1010 times the luminosity of the Sun); collections of galaxi ...
s.
It is located approximately 87 Mly (27 Mpc) from the
Solar System
The Solar SystemCapitalization of the name varies. The International Astronomical Union, the authoritative body regarding astronomical nomenclature, specifies capitalizing the names of all individual astronomical objects but uses mixed "Sola ...
.
The Virgo III Cloud, like the
Leo Cloud
The Leo II Groups, Leo II Cloud, or simply the Leo Cloud is a galaxy filament consisting of at least 18 galaxy groups. It is located approximately 86 Mly (26 Mpc) from the Solar System. The Leo Cloud in Supergalactic coordinate system, supergal ...
,
is prolate and points toward the
Virgo Cluster
The Virgo Cluster is a cluster of galaxies whose center is 53.8 ± 0.3 Mly (16.5 ± 0.1 Mpc) away in the Virgo constellation. Comprising approximately 1,300 (and possibly up to 2,000) member galaxies, the cluster forms the heart of the larger ...
.
List of groups
Below is a list of groups in the Virgo III Cloud according to astronomer
Brent Tully
Richard Brent Tully (born March 9, 1943) is a Canadian-born American astronomer at the Institute for Astronomy in Honolulu, Hawaii.
Born in Toronto, Ontario, and raised in Vancouver, British Columbia, Tully's specialty is the astrophysics of ga ...
.
: Column 1: The name of the group in Tully's NBGG
: Column 2: The right ascension for epoch 2000.
: Column 3: The declination for epoch 2000.
: Column 4: Number of members of the group.
: Column 5: Brightest member of the group
: Column 6: Redshift of the group.
: Column 7: Distance of the group (Millions of light-years).
: Column 8: Cross-Identifications with other catalogs.
(Sources for data columns:
)
See also
*
Virgo II Groups
The Virgo II Groups, also known as the Virgo II Cloud, Virgo Southern Extension, or the Virgo S Cloud, are a series of at least 100 galactic clusters and individual galaxies stretching approximately off the southern edge of the Virgo Supercluste ...
References
{{Reflist
Virgo Supercluster
Galaxy filaments
Virgo III Cloud