I have a feeling this full Moon augurs well for a good harvest

Wednesday, 29 September, 2010

Astronomy Picture of the Day: in the northern hemisphere the full Moon occurring closest to the autumnal equinox, which this year took place on 23 September, is called the Harvest Moon.

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Photo: another long hot summer night in Sydney

Friday, 19 February, 2010

The days are gradually becoming shorter and the nights are no longer quite as hot and humid as they’ve been, summer on the run?

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Are we witnessing climate change on Pluto?

Monday, 8 February, 2010

The appearance of outer most (dwarf) planet Pluto has changed significantly in the last two years, after remaining relatively unaltered for the previous 50.

The new images, taken in 2002 and 2003, confirm that Pluto’s surface is actively changing. For reasons that are still mysterious, Pluto’s appearance remained constant for some 50 years of observations before its surface colour became 20 to 30 per cent redder over two years at the beginning of the decade. Over the same period, Pluto’s northern hemisphere also brightened, while its southern hemisphere darkened. This appears to be due to ice vaporising in the sunlit north and refreezing in the wintry south, NASA says.

An explanation may lie in Pluto’s long yet erratic seasons, which can last up to 120 years, with the transformation from winter to summer (such that it is, given temperatures hover at around -200° celsius) causing nitrogen ice to melt and freeze in different hemispheres, thus causing changes in surface colours.

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Coming to Australia, six to eight seasons in one day?

Tuesday, 25 August, 2009

Australia should consider adopting a six-season climate and weather cycle, as the traditional four season cycle doesn’t suit local conditions, says the head of the Royal Botanic Gardens in Sydney, who notes that some Aboriginal Australians have eight-season years.

Tim Entwisle, chief of Sydney’s Royal Botanic Gardens, says Australia should “unhook” itself from the “arbitrary” four seasons it inherited from Britain. Mr Entwisle has proposed “sprummer” – the season between spring and summer – and “sprinter” – an early spring.

With temperatures way above average for winter in Sydney and eastern Australia at the moment, I’m thinking we probably only need two seasons… summer and not-summer.

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La Nina is this autumn’s black

Monday, 7 April, 2008

Autumn time, Sydney

Autumn arrived with a windy blast last week. Enjoy the mild conditions while you can though, Sydney is expected to have a cooler and wetter than normal autumn.

Compliments of the La Nina weather event.

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