From BiblePortal Wikipedia

American Tract Society Bible Dictionary [1]

 2 Kings 23:5 . The Hebrew word means inns or lodgings, and is used with reference to the sun, denoting the twelve constellations of the zodiac, the houses of the sun in its annual apparent course round the heavens. These constellations are here spoken of as objects of idolatrous worship in Judah. Compare  Genesis 37.9 .

Morrish Bible Dictionary [2]

The Hebrew word is mazzaloth, and is supposed to refer to the twelve signs or constellations of the Zodiac, as intimated in the margin. These, with the sun, moon, and 'all the host of heaven,' had been worshipped by the Israelites.  2 Kings 23:5 . The word occurs nowhere else.

The Nuttall Encyclopedia [3]

Bodies resembling the earth and of different sizes, which revolve in elliptical orbits round the sun, and at different distances, the chief of them eight in number, two of them, viz., Mercury and Venus, revolving in orbits interior to that of the earth, and five of them, viz., Mars, Jupiter, Saturn, Uranus, and Neptune, exterior , the whole with the Planetoids ( q. v .) and comets constituting the solar system.

International Standard Bible Encyclopedia [4]

plan´ets ( מזּלות , mazzālōth ). See Astrology , II, 3.