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http://en.wikipedia.org/wiki/Purple_Forbidden_enclosure
——According to Hipparcos, Alioth is 81 light years (25 parsecs) from Earth. Its spectral type is A0p; the “p” stands for peculiar, as the spectrum of its light is characteristic of an Alpha2 Canum Venaticorum variable. Alioth, as a representative of this type, may harbor two interacting processes. First, the star’s strong magnetic field separating different elements in the star’s hydrogen ‘fuel’. In addition, a rotation axis at an angle to the magnetic axis may be spinning different bands of magnetically-sorted elements into the line of sight between Alioth and the Earth. The intervening elements react differently at different frequencies of light as they whip in and out of view, causing Alioth to have very strange spectral lines that fluctuate over a period of 5.1 days.
With Alioth, the rotational and magnetic axes are at almost 90 degrees to one another. A map of the star below shows how darker (denser) regions of chromium form a band at right angles to the equator.
A recent study suggests Alioth’s 5.1-day variation may be due to a substellar object of about 14.7 Jupiter masses in an eccentric orbit (e=0.5) with an average separation of 0.055 astronomical units.
Alioth has a relatively weak magnetic field, fifteen times weaker than α CVn, but it is still 100 times stronger than that of the Earth.1 Hear ye this word which I take up against you, even a lamentation, O house of Israel.
2 The virgin of Israel is fallen; she shall no more rise: she is forsaken upon her land; there is none to raise her up.
3 For thus saith the Lord GOD; The city that went out by a thousand shall leave an hundred, and that which went forth by an hundred shall leave ten, to the house of Israel.
4 For thus saith the LORD unto the house of Israel, Seek ye me, and ye shall live:
5 But seek not Bethel, nor enter into Gilgal, and pass not to Beersheba: for Gilgal shall surely go into captivity, and Bethel shall come to nought.
6 Seek the LORD, and ye shall live; lest he break out like fire in the house of Joseph, and devour it, and there be none to quench it in Bethel.
7 Ye who turn judgment to wormwood, and leave off righteousness in the earth,
8 Seek him that that fashioned Kimah and Kesil, and turneth the shadow of death into the morning, and maketh the day dark with night: that calleth for the waters of the sea, and poureth them out upon the face of the earth: The LORD is his name:
9 That strengtheneth the spoiled against the strong, so that the spoiled shall come against the fortress.
10 They hate him that rebuketh in the gate, and they abhor him that speaketh uprightly.
11 Forasmuch therefore as your treading is upon the poor, and ye take from him burdens of wheat: ye have built houses of hewn stone, but ye shall not dwell in them; ye have planted pleasant vineyards, but ye shall not drink wine of them.
12 For I know your manifold transgressions and your mighty sins: they afflict the just, they take a bribe, and they turn aside the poor in the gate from their right.
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