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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.

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Melbourne's minimum warmer than maximum

17:37 EST

Overnight, Melbourne experienced very warm temperatures under a blanket of cloud ahead of a cold front.

Meet the future forecasters: Students studying to become meteorologists spend time with the Bureau

15:29 EST

There are few things farmers enjoy talking about more than weather, even if it's bad news, but it's not just farmers who have a keen eye on the skies.

The weather bureau details the seasonal outlook for Tasmania and whether any extra rainfall is on the horizon

14:40 EST

The weather bureau has released its latest seasonal outlook covering the three months of spring which says there are no strong indications for extra rainfall.