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

Stormy night in the Top End

10:20 EDT

Severe thunderstorms tracked over the Northern Territory's western Top End early on Thursday morning, putting on a spectacular light show and causing the heaviest rain in ten months for some areas.

Climate change already affecting hurricanes and tropical cyclones, research shows

06:04 EDT

You've probably heard people blame the devastating impacts of cyclones, hurricanes, or typhoons on climate change.

Drought from the inside looking out: How farmers' amateur photography adds new perception

17:05 EDT

When your our own backyard is a massive drought-stricken landscape, telling your own story through photography can be great therapy.