Old English literature, though more abundant than literature of the continent before AD 1000 is nonetheless scant. In his supplementary article to the 1935 posthumous edition of Bright's Anglo-Saxon R ...
Old English was not static, and its usage covered a period of 700 years, from the Anglo-Saxon settlement of Britain in the 5th century to the late 11th century, some time after the Norman invasion.Old ...
Generally, all letters in Middle English words were pronounced. (Silent letters in Modern English generally come from pronunciation shifts, which means that pronunciation is no longer closely reflecte ...
Important texts for the reconstruction of the evolution of Middle English out of Old English are the Ormulum (12th century), the Ancrene Wisse and the Katherine Group (early 13th century, see AB langu ...
Because the moon is moving in its orbit around the earth and in the same sense as the Earth's rotation, a point on the earth must rotate slightly further to catch up so that the time between semidiurn ...
Tide changes proceed via the following stages:Sea level rises over several hours, covering the intertidal zone; flood tide.The water rises to its highest level, reaching high tide.Sea level falls over ...
A tropical year (also known as a solar year), for general purposes, is the length of time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, th ...
In astronomy, axial tilt (also called obliquity) is the angle between an object's rotational axis and the perpendicular to its Orbital plane, both oriented by the right hand rule. At an obliquity of 0 ...
To make the perpendicular to the line AB through the point P using compass and straightedge, proceed as follows (see figure):Step 1 (red): construct a circle with center at P to create points A' and B ...
This effect is easier to measure than the north/south movement of the position of sunrise (except in high-latitude regions), which defines the seasonal cycle and the tropical year on which the Gregori ...
The Moon is a differentiated body: it has a geochemically distinct crust, mantle, and core. The Moon has a solid iron-rich inner core with a radius of 240 kilometers and a fluid outer core primarily m ...
Fix a tall pole vertically in the ground; at some instant on any sunny day the shadow will point exactly north or south (or disappear, if the Sun is directly overhead). That instant is local apparent ...
Scientific revolutionModern work on gravitational theory began with the work of Galileo Galilei in the late 16th and early 17th centuries. In his famous (though possibly apocryphal) experiment droppin ...
The mantle is divided into sections which are based upon results from seismology. These layers (and their thicknesses/depths) are the following: the upper mantle (starting at the Moho, or base of the ...
The temperature of the outer core ranges from 4,300 K (4,030 °C; 7,280 °F) in the outer regions to 6,000 K (5,730 °C; 10,340 °F) near the inner core. Because of its high temperature, modeling work ...
