Fairfax Media Network

Weather Glossary - Y

Search

Year

The interval required for the earth to complete one revolution around the sun. A sidereal year, which is the time it takes for the earth to make one absolute revolution around the sun, is 365 days, 6 hours, 9 minutes and 9.5 seconds. The calendar year begins at 12 o'clock midnight local time on the night of December 31st-January 1st. Currently, the Gregorian calendar of 365 days is used, with 366 days every four years, a leap year. The tropical year, also called the mean solar year, is dependent on the seasons. It is the interval between two consecutive returns of the sun to the vernal equinox. In 1900, that took 365 days, 5 hours, 48 minutes, and 46 seconds, and it is decreasing at the rate of 0.53 second per century. This decrease is due to the slow precession of the Earth's axis of rotation.

Display Your Local Weather

Weather News

Labor, Greens slam Agriculture White Paper for lack of strategic vision or climate change consideration

15:45 EST

Prime Minister Tony Abbott says his government "wants to back people who are prepared to back themselves", and that a newly released vision for Australian agriculture will do just that.

Federal Government unveils long-awaited plan for Australian agriculture

15:44 EST

The Federal Government has released the long awaited , which it had promised to deliver within 12 months of the 2013 election.

Farmers welcome Agriculture White Paper's vision for the future

15:42 EST

Farm groups have welcomed the Federal Government's plan for Australia's agricultural future, particularly tax reforms and changes to Farm Management Deposits (FMD).