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  2. Messier object - Wikipedia

    en.wikipedia.org/wiki/Messier_object

    Charles Messier. The first edition of 1774 covered 45 objects (M1 to M45). The total list published by Messier in 1781 contained 103 objects, but the list was expanded through successive additions by other astronomers, motivated by notes in Messier's and Méchain's texts indicating that at least one of them knew of the additional objects.

  3. Charles Messier - Wikipedia

    en.wikipedia.org/wiki/Charles_Messier

    Charles Messier (French: [ʃaʁl me.sje]; 26 June 1730 – 12 April 1817) was a French astronomer. He published an astronomical catalogue consisting of 110 nebulae and star clusters , which came to be known as the Messier objects , referred to with the letter M and their number between 1 and 110.

  4. Coin set - Wikipedia

    en.wikipedia.org/wiki/Coin_set

    Set of 2007 $1 coins from the United States Mint. A coin set, or mint set, is a collection of uncirculated or proof coins, released by a mint. Such sets are usually released annually and often called a year set. They include sets of all the circulating coins of that year, as well as sets of commemorative coins.

  5. United States Mint coin sets - Wikipedia

    en.wikipedia.org/wiki/United_States_Mint_coin_sets

    More recent sets contain non-circulating half-dollar and dollar denominations. From the 2005 mint set coins through the 2010 mint set coins were prepared using special dies that produce a "satin finish" distinct from business strike coins. The US Mint reverted to coins that are typically minted for general circulation in 2011.

  6. Standard Catalog of World Coins - Wikipedia

    en.wikipedia.org/.../Standard_Catalog_of_World_Coins

    2020 Standard Catalog of World Coins: 1901–2000, 47th Edition, publication date 2019, Krause Publications, ISBN 978-1-4402-4896-2; 2020 Standard Catalog of World Coins: 2001–Date, 14th Edition, publication date 2019, Krause Publications, ISBN 978-1-4402-4897-9; All with digital copy available separately. Other related catalogs

  7. Messier marathon - Wikipedia

    en.wikipedia.org/wiki/Messier_marathon

    A Messier marathon is an attempt, usually organized by amateur astronomers, to find as many Messier objects as possible during one night. The Messier catalogue was compiled by French astronomer Charles Messier during the late 18th century and consists of 110 relatively bright deep-sky objects (galaxies, nebulae, and star clusters).

  8. Messier 102 - Wikipedia

    en.wikipedia.org/wiki/Messier_102

    Messier 102 (also known as M102) is a galaxy listed in the Messier Catalogue that cannot be unambiguously identified. Its original discoverer Pierre Méchain retracted his discovery two years after publication and said that it was a duplicate observation of Messier 101 . [ 1 ]

  9. Krause Publications - Wikipedia

    en.wikipedia.org/wiki/Krause_Publications

    In addition, they established the Coin of the Year Award, first issued in 1984, for excellence in coinage design. [4] In the paper money collecting community, the company is known for its paper money catalogs. In 1975, the first edition of the seminal Standard Catalog of World Paper Money authored by Albert Pick was published.

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