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Article #4756Earliest known Deep Sky objects; Ptolemy's cluster M7
From: Hartmut Frommert
Date: Tue, 04 Jul 1995 00:00
Date: Tue, 04 Jul 1995 00:00
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According to the Guinness Book of Stars, the first known Deep Sky
objects were:
1. The Pleiades (M45), known since pre-historic times
2. 3 objects mentioned by Ptolemy 138 A.D.:
1. M44 (NGC 2632, Praesaepe); mentioned before by
Hipparcus about 130 B.C., according to Kenneth Glyn Jones
2. M7 "Nebula, following the sting of Scorpius"
3. h+chi Per (NGC 869/884, the Double Cluster)
I propose to adopt the name "Ptolemy's Cluster" for M7, as
M44 and the double cluster have already other names, and M44
was mentioned by Hipparcus before.
What appears strange to me is that they all did not mention the Orion
nebula before N. Peiresc's 1610, besides Ptolemy's notion of a star.
-
| OS/2 vs. NT: Better Half than Not Testified
Hartmut Frommert | Warp 3.0 vs. 95: Cheaper, Smaller, Faster
<phfrom@nyx.uni-konstanz.de> | and finally, it exists..
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 113b02,aff395301b217aa7 X-Google-Attributes: gid113b02,public X-Google-Thread: 113975,aff395301b217aa7 X-Google-Attributes: gid113975,public X-Google-Thread: 111e54,aff395301b217aa7 X-Google-Attributes: gid111e54,public X-Google-Thread: f74ae,aff395301b217aa7 X-Google-Attributes: gidf74ae,public From: phfrom@nyx.uni-konstanz.de (Hartmut Frommert) Subject: Earliest known Deep Sky objects; Ptolemy's cluster M7 Date: 1995/07/04 Message-ID: <phfrom.1076.0@nyx.uni-konstanz.de> X-Deja-AN: 105657490 distribution: world references: <phfrom.1072.0@nyx.uni-konstanz.de> <phfrom.1073.0@nyx.uni-konstanz.de> <phfrom.1074.0@nyx.uni-konstanz.de> <phfrom.1075.0@nyx.uni-konstanz.de> organization: University of Constance, Dept. of Physics newsgroups: sci.astro,sci.astro.amateur,fido.ger.astronomie,zer.z-netz.wissenschaft.astronomie.allgem