Latitude constant latitude and constant longitude, which are constructed with reference to the rotation axis of the Earth. The primary reference points are the poles where the axis of rotation of the Earth intersects the reference surface. Planes which contain the rotation axis intersect the surface at the meridians; and the angle between any one meridian plane and that through Greenwich (the Prime Meridian) defines the longitude: meridians are lines of constant longitude. The plane through the centre of the Earth and perpendicular to the rotation axis intersects the surface at a great circle called the Equator. Planes parallel to the
The Middle-Earth Album The Middle-Earth Album The Middle-Earth Album is the fifth studio album by American progressive rock band Glass Hammer, released on June 15, 2001. It is the band's second album based on J.R.R. Tolkien's novel "The Lord of the Rings", after their 1993 debut album "Journey of the Dunadan", and their second release not to be concept album, after 1998's "On to Evermore". It is the first album to feature singer Susie Bogdanowicz after she joined as band member, and as such the first album to feature the band's longest and steadiest line-up, which would last until their tenth studio album,