Sunday 16 May 2010

Hadley cell

The Hadley cell is a circulation pattern that dominates the tropical atmosphere, with rising motion near the equator, poleward flow 10-15 kilometers above the surface, descending motion in the subtropics, and equatorward flow near the surface. This circulation is intimately related to the trade winds, tropical rainbelts, subtropical deserts and the jet streams.

Halley's Comet

Halley's Comet or Comet Halley (officially designated 1P/Halley) is the best-known of the short-period comets, and is visible from Earth every 75 to 76 years. Halley is the only short-period comet that is clearly visible to the naked eye from Earth, and thus the only naked-eye comet that might appear twice in a human lifetime. Other naked-eye comets may be brighter and more spectacular, but will appear only once in thousands of years. Halley's returns to the inner Solar System have been observed by astronomers since at least 240 BC, and recorded by Chinese, Babylonian, and medieval European chroniclers, but were not recognized as reappearances of the same object. The comet's periodicity was first determined in 1705 by English astronomer Edmond Halley, after whom it is now named. Halley's Comet last appeared in the inner Solar System in 1986 and will next appear in mid-2061.

http://isleofmanmansions.blogspot.com/

Sunday 9 May 2010

High Barnet

High Barnet or Chipping Barnet is a place in the London Borough of Barnet, North London, England. It is a suburban development built around a twelfth-century settlement and is located 10 miles (16.1 km) north north-west of Charing Cross. Its name is often abbreviated to Barnet, which is also the name of the London borough of which it forms a part. Chipping Barnet is the name of the Parliamentary constituency covering the local area - the word 'Chipping' denotes the presence of a market (one was established here in the thirteenth century
persists to this day).