Heavenly lights

View from the ISS at Night from Knate Myers on Vimeo.

NASA turns poet

 

Rumbles without sound

Auroras rain down
Magnetic fields shake
Beware the spacequake

Vortices swirl
plasma a'twirl
Richter predicts
a magnitude six

This month NASA decided to explain spacequakes

with information, graphs and 

a little poetry. 

Bright winding ribbon discovered at edge of solar system - it's the Universe waving Earth goodbye

This week NASA announced the discovery of a bright winding ribbon within the heliosphere surrounding our solar system.

One jaded local (tiring of the uphill battle to get government to do something about actually reducing national, state and regional carbon emission levels rather than just talking around the problem) suggests that this ribbon is the Universe giving one last wave goodbye to an Earth choking to death on greenhouse gases and other pollutants.

Climate change largely irreversible for 1,000 years after excessive greenhouse emissions stop?

One of the distressing abstracts found online at the National Academy of Sciences of the United States of America:

The severity of damaging human-induced climate change depends not only on the magnitude of the change but also on the potential for irreversibility. This paper shows that the climate change that takes place due to increases in carbon dioxide concentration is largely irreversible for 1,000 years after emissions stop. Following cessation of emissions, removal of atmospheric carbon dioxide decreases radiative forcing, but is largely compensated by slower loss of heat to the ocean, so that atmospheric temperatures do not drop significantly for at least 1,000 years. Among illustrative irreversible impacts that should be expected if atmospheric carbon dioxide concentrations increase from current levels near 385 parts per million by volume (ppmv) to a peak of 450–600 ppmv over the coming century are irreversible dry-season rainfall reductions in several regions comparable to those of the “dust bowl” era and inexorable sea level rise. Thermal expansion of the warming ocean provides a conservative lower limit to irreversible global average sea level rise of at least 0.4–1.0 m if 21st century CO2 concentrations exceed 600 ppmv and 0.6–1.9 m for peak CO2 concentrations exceeding ≈1,000 ppmv. Additional contributions from glaciers and ice sheet contributions to future sea level rise are uncertain but may equal or exceed several meters over the next millennium or longer.

Full 2009 paper in PDF form here.

While we're all busy swatting mosquitoes....

While we are busy swatting at summer's mosquitoes, fighting to keep ants out of the kitchen and frequently disabusing stray spiders of the idea that they own our living rooms, it is easy to overlook the fact that the number and types of insects, bees and butterflies found in urban gardens across much of the NSW North Coast appear to be falling away.

Prolonged droughts, land clearing and general loss of native habitat have a lot to do with the fact that some species are becoming rarer occupants of our gardens.

As we are all encouraged to make the garden a low-water collection of plantings we shouldn't forget that it is much better to hunt out suitable Australian natives or dry condition plants with high flower/pollen yields or other insect attracting natural assets.

Go to Aussie Bee for a few tips and to find out which of the 1,500 species of natives bees are in your area.
The ABC's Gardening Australia has fact sheets on native plants and biological controls.
The CSIRO also has a comprehensive data base on its National Insect Collection.
The National Botanic Gardens webpage on Growing Australian Natives is a good A-Z starting point for searching out plants, as is your local library.

So as summer ends - have another look at the garden, do a little research and make an attempt (no matter how small) to bring a little more life back into your yard.



Pictures are of the Blue Banded Bee which is no longer a frequent visitor to my own garden.

Happy Birthday, Charles Darwin. The theory of evolution rocks!

Today; two hundred years ago Charles Robert Darwin, the English naturalist, was born and human society became all the richer for this fact.

NASA features NSW night sky as December smiley face picture

Smile in the Sky Credit & Copyright: Mike Salway

Explanation: At sunset, Monday's western sky showed off stunning colors and dramatic clouds reflected in Brisbane Water on the Central Coast of New South Wales, Australia. It also featured the remarkable conjunction of the crescent Moon, Venus, and Jupiter forming a twilight smiley face. While the gathering of the two bright planets and Moon awed skygazers around planet Earth, astronomer Mike Salway reports taking special pains to record this gorgeous view, braving mosquitos and rain squalls along a soggy shore. His southern hemisphere perspective finds brilliant Venus at the highest point in the celestial grouping. For now, a bright pairing of Venus and Jupiter continues to dominate the western horizon after sunset but the Moon has moved on and tonight is near its first quarter phase. [NASA APOD]

A News.com.au collection of readers photographs found here.