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By nature the middle is first, and around it dance ten divine bodies—the sky, the planets, then the sun, next the moon, next the earth, next the counterearth, and after all of them the fire of the hearth which holds position at the centre. The highest part of the surrounding, where the elements are found in their purity, he calls Olympus; the ...
The Perseus cluster (Abell 426) is a cluster of galaxies in the constellation Perseus. It has a recession speed of 5,366 km/ s and a diameter of 863 ′ . [ 1 ] It is one of the most massive objects in the known universe , containing thousands of galaxies immersed in a vast cloud of multimillion-degree gas.
NGC 957 (also known as Collinder 28) is a loosely bound open cluster located in the constellation Perseus. It has an apparent magnitude of 7.6 [ 1 ] and an approximate size of 11 arc-minutes . It is young at less than 11 million years old.
The image shows roughly 1,000 galaxies that form the Perseus Cluster, along with more than 100,000 other galaxies further away that each contain up to hundreds of billions of stars.
As each day is divided into 24 hours, the first hour of a day is ruled by the planet three places down in the Chaldean order from the planet ruling the first hour of the preceding day; [2] i.e. a day with its first hour ruled by the Sun ("Sunday") is followed by a day with its first hour ruled by the Moon ("Monday"), followed by Mars ("Tuesday ...
Messier 34 (also known as M34, NGC 1039, or the Spiral Cluster) is a large and relatively near open cluster in Perseus. It was probably discovered by Giovanni Batista Hodierna before 1654 [ 4 ] and included by Charles Messier in his catalog of comet -like objects in 1764.
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Books 9 to 13 are dedicated to the five visible (and thus, at the time, the five known) planets. Book 9 lays out a general approach for all the planets, followed by the theory for Mercury. Book 10 deals with Venus and Mars. Book 11 deals with Jupiter and Saturn. Book 12 deals with the phenomena of retrogradation and other features of planetary ...