Sleuthing for 7,840 Deep Sky Objects @ Oregon Museum of Science and Industry (OMSI), Portland [20 March]

Sleuthing for 7,840 Deep Sky Objects


52
20
March
19:30 - 21:00

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Oregon Museum of Science and Industry (OMSI)
1945 SE Water Ave, Portland, Oregon 97214
Our speaker Steve Gottlieb recently completed observing 7840 galaxies and nebulas — the entire «New General Catalogue of Nebulae and Clusters of Stars» (NGC) — a project that took over 35 years and many trips to the southern hemisphere. The NGC was compiled in 1888 by astronomer John Dreyer, but contains a staggering number of errors due to poor positions, misidentifications, duplicate entries and incorrect classifications. Steve will be discussing the NGC/IC Project, a joint amateur-professional effort to re-examine the 100 to 200 year-old source material used by Dreyer.

Some of the errors in the NGC have created a maze of confusion in professional databases and amateur software. The project's sleuthing has resulted in recovering literally hundreds of mistaken or lost NGC and IC (Index Catalogue) identities. Steve will discuss the project’s results and the final compilation of a historically accurate NGC/IC catalogue.
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