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The Local Void is a vast, empty region of space, lying adjacent to the Local Group. [ 3 ] [ 4 ] Discovered by Brent Tully and Rick Fisher in 1987, [ 5 ] the Local Void is now known to be composed of three separate sectors, separated by bridges of "wispy filaments ". [ 4 ]
Some of the free software mentioned here does not have detailed maps (or maps at all) or the ability to follow streets or type in street names (no geocoding). However, in many cases, it is also that which makes the program free (and sometimes open source [ 1 ] ), avoid the need of an Internet connection, [ 2 ] [ 3 ] [ 4 ] and make it very ...
[18] The Perseus–Pisces Supercluster and Pegasus Supercluster form a sheet separate the Northern Local Void and Southern Local Void from the Pegasus Void. [2] Perseus–Pisces Void: 1 h +10° cz=8000 km/s 3000 km/s Discovered in 1980, [15] it is also called the Perseus Void: Sagittarius Void: Sculptor Void: 23 h 48 m −24° 39′ 34.8 Mpc/h
PDFtk (short for PDF Toolkit) is a toolkit for manipulating Portable Document Format (PDF) documents. [ 3 ] [ 4 ] It runs on Linux , Windows and macOS . [ 5 ] It comes in three versions: PDFtk Server ( open-source command-line tool ), PDFtk Free ( freeware ) and PDFtk Pro ( proprietary paid ). [ 2 ]
Google Earth is a web and computer program that renders a 3D representation of Earth based primarily on satellite imagery.The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles.
The KBC Void (or Local Hole) is an immense, comparatively empty region of space, named after astronomers Ryan Keenan, Amy Barger, and Lennox Cowie, who studied it in 2013. [1] The existence of a local underdensity has been the subject of many pieces of literature and research articles.
The Northern Local Supervoid is a region of space devoid of rich clusters of galaxies, known as a void. It is the closest supervoid and is located between the Virgo (Local), Coma and Hercules superclusters. On the sky, it is located between Boötes, Virgo, and Serpens Caput constellations.
Local Sheet: 7 Mpc 2.16×10 20: Group of galaxies including the Local Group moving at the same relative velocity towards the Virgo Cluster and away from the Local Void. [40] [41] Virgo Supercluster: 30 Mpc 9.26×10 20: The supercluster of which the Local Group is a part. It comprises roughly 100 galaxy groups and clusters, centred on the Virgo ...