In 1985 Halperin authored a text on grading coins, How to Grade U.S. Coins, upon which the grading standards of the two leading third-party grading services PCGS and NGC were ultimately based.
NGC | NGC 7006 | NGC 6946 | NGC 6729 | NGC 6541 | NGC 6302 | NGC 5866 | NGC 5823 | NGC 55 | NGC 5286 | NGC 3242 | NGC 3169 | NGC 2770 | NGC 1999 | NGC 1851 | NGC 1261 | NGC 1097 |
Caldwell 92 (the Carina Nebula, NGC 3372), a bright nebula and star-forming region in the constellation of Carina
National Geographic Channel - factual channel in partnership with NGC Networks Asia/Fox International Channels (especially STAR TV)
Although the state of Georgia was allocated $250 million by President Roosevelt's New Deal it was not enough to entirely alleviate the financial distress of many of the state's colleges, including NGC.
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Not only was the military integrity of NGC preserved, but during this time it was the only junior college in the nation to have an (ASTP) Army Specialized Training Program.
Messier 81, a spiral galaxy in the constellation Ursa Major, also known as NGC 3031 or Bode's Galaxy
Boaro joined professional team Carmiooro-NGC in the second half of 2010 as a stagiaire.
In the 2009 edition, Mexus Education in association with National Geographic Channel (NGC) and the Ministry of Science and Technology took 'Iken Scientifica 2009- Season III' to 700 schools across 14 cities.
NGC 2770 is a type SASc spiral galaxy located about 88 million light years away, in the constellation Lynx.
Colloquially, NGC 281 is also known as the Pacman Nebula for its resemblance to the video game character.
In 2012 Apple Inc used a blue tinted image of NGC 3190 as their desktop image for their release of OS X Mountain Lion.
NGC 3561 is a pair of interacting galaxies NGC 3561A and NGC 3561B within the galaxy cluster Abell 1185.
NGC 3738 is a dwarf galaxy lying in the constellation of Ursa Major, located about 12 million light-years from the Sun, and belongs to the Messier 81 group of galaxies.
In 1998, the light from a supernova in NGC 3982 (later called SN 1998aq) reached earth and was discovered by British amateur astronomer Mark Armstrong.
NGC 4698 is classified as a Seyfert-2 galaxy with an active galactic nucleus, which displays a prominent emission of radio and X-ray energy from the core while showing narrow emission lines in the optical spectrum.
NGC 61 is a pair of Lenticular galaxies, NGC 61-A (or NGC 61-1) and NGC 61-B (or NGC 61-2) in the constellation Cetus.
At one time NGC 6384 was considered a normal galaxy with no activity in the nucleus.
NGC 7049 is the brightest (BCG) of the Indus triplet of galaxies (NGC 7029, NGC 7041, NGC 7049), and its structure might have arisen from several recent galaxy collisions.
Halton Arp includes NGC 772 in his Atlas of Peculiar Galaxies as Arp 78, where it is described as a "Spiral galaxy with a small high-surface brightness companion".
The soundtrack of the 1974 film Dark Star by John Carpenter features an instrumental piece called When Twilight Falls On NGC 891.
In the May 26, 2003 edition of Coin World, the hobby newspaper had announced they had contracted investigators to conduct a year-long, comparative study of PCGS, ACCGS, NGC (Numismatic Guaranty Corporation) and several other grading services, each known as a Third Party Grader (TPG).
Copeland discovered thirty-five NGC objects, most of them with Lord Rosse's 72" reflector. Planetary nebulae were found by visual spectroscopy at Dun Echt and during an Andes expedition. Seven of the galaxies in the constellation Leo form the famous "Copeland Septet": NGC 3745, 3746, 3748, 3750, 3751, 3753, and 3754.
It is used by nearly all major coin grading companies, the main two being NGC and PCGS.
The influence of the book has caused the incorrect spelling "piefort" to be used by third-party grading services such as NGC and PCGS in labeling coin attributions.