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The planetary hours are an ancient system in which one of the seven classical planets is given rulership over each day and various parts of the day. Developed in Hellenistic astrology, it has possible roots in older Babylonian astrology, and it is the origin of the names of the days of the week as used in English and numerous other languages.
Shapley 1 (Sp 1 or PLN 329+2.1) [3] is an annular planetary nebula in the constellation of Norma with a magnitude of +12.6. [4] As viewed from Earth, it is peculiar in that it seems to be a non-bipolar, torus-shaped planetary nebula. However, it is thought that this is due to the viewpoint of looking directly down on a binary system whose orbit ...
Jones-Emberson 1 (PK 164+31.1), also known as the Headphone Nebula, is a 14th magnitude planetary nebula in the constellation Lynx at a distance of 1600 light years. It is a larger planetary with low surface brightness. The 16.8-magnitude central star is a very blue white dwarf.
BoBn — Boeshaar-Bond (planetary nebulae) (for example: BoBn 1, an extragalactic planetary nebula at 0:37 / -13°42' in Cetus) Bode — (telescopic asterisms) Boe — Boeger (double stars) Bogleiv (open star clusters) Bonatto (open star clusters) Boo — Samuel Latimer Boothroyd, 1874–1965 (double stars) Boy — Bowyer (double stars)
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The first hour of each day was named after the ruling planet, giving rise to the names and order of the Roman seven-day week. Modern Latin-based cultures, in general, directly inherited the days of the week from the Romans and they were named after the classical planets; for example, in Spanish Miércoles is Mercury, and in French mardi is Mars ...
14:56:38 Mercury 1°01' south of Jupiter 6.4° East November 13, 2017 06:10:03 Venus 17' north of Jupiter 13.8° West November 28, 2017 09:36:06 Mercury 3°03' south of Saturn 21.1° East December 6, 2017 11:29:41 Mercury 1°21' south of Saturn 13.9° East December 15, 2017 16:04:48 Mercury 2°14' north of Venus 5.9° West December 25, 2017
The Medusa Nebula is a planetary nebula in the constellation of Gemini.It is also known as Abell 21 and Sharpless 2-274. It was originally discovered in 1955 by University of California, Los Angeles astronomer George O. Abell, who classified it as an old planetary nebula. [4]