Here comes the Sun

Aug 2013

NASA/SDO Image

Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams

Something big is about to happen on the Sun. According to measurements from NASA-supported observatories, the sun’s vast magnetic field is about to flip.

“It looks like we’re no more than 3 to 4 months away from a complete field reversal,” says solar physicist Todd Hoeksema of Stanford University. “This change will have ripple effects throughout the solar system.”

After reading this I looked through the window at a cloudy winter sky. In 3 – 4 months the smiles are supposed to be returning to our faces here in the Southern Hemisphere just like the Beatles promised. Now it seems we are in for some stormy space weather.

How much will this event effect us here on Earth this time?

Every eleven years (give or take a year or two) the Sun goes through a sunspot cycle which is linked to magnetic forces. Now what have magnetic forces got to do with pole reversals?

Reading up on the Parker Solar Dynamo Theory, only to learn that the theory was flawed, I proceeded to the Babcock-Leighton Model until I hit the sentence: Unfortunately it could not offer a prediction…..

OK so now I’ve wasted some time but not to be deterred I googled until I found written in bold: And the answer is….

ah ha!
Two separate processes seem to be going on: The Local Dynamo and the Global Dynamo. Before attaching major significance to a whole lot of really weird terms like the Tachocline and helioseismometry data from SOHO, I scrolled down to the bottom of the page just to make sure I was on the right track. “There are still many details to be worked out….”

While the physicists work on the many details, Kid’s Astronomy gives a nice explanation. Solar Magnetic Field reversals occur more or less every eleven years and at a time when solar activity is at its peak. Solar storms travel through space towards Earth. Energy and radiation from solar flares and coronal mass ejections can harm astronauts, damage electronics on satellites, cause the most beautiful auroras blackouts on Earth by surges in power grids.

There have been predictions that the upcoming solar storm will outdo the 1859 Carrington Event, a super storm so intense that the Northern Lights could be seen from Rome!

Should I book a ticket to Rome or will media headlines change from Something big is about to happen on the Sun to Something is about to happen on the big Sun.

Well seeing that the Sun’s magnetic field has flipped 5.5 times before in my lifetime, for now I might as well carry on humming: Here comes the sun, here comes the sun and I say it’s all right, sun, sun, sun, here it comes

http://science.nasa.gov/science-news/science-at-nasa/2013/05aug_fieldflip/
http://science.nasa.gov/heliophysics/

Claim to the Country

June 2010

Claim-to-the-CountryA few years ago I was asked to illustrate Bushman folklore as an extension to my astronomy activities. I soon discovered that trying to imitate Bushman drawings and paintings was not as easy as one might think.My son’s advice was that I slaughter an animal and go searching for just the right stick to dip in its blood. From further research I also found out that I would have to smoke certain substances and do foot stomping around a fire in order to reach a trance-like state and then only if I had been ordained as a shaman I would be able to project my visions of enlightenment on a suitable rock face.

I decided to approach the task with a digital camera, pencil sketches, colour kokis and computer editing. My first line of reference was a paper published by A.Slotegraaf (ASSA) and W.P.Koorts(SAAO) in MNASSA 65(7&8) 104 on the Xam astronomical references in G R von Wielligh’s Boesman-Stories.

During further research names like Wilhelm Bleek, Lucy Lloyd, David Lewis-Williams, and Pippa Skotnes became familiar. However I only became aware that a magnificent book, Claim to the Country by Pippa Skotnes had been launched in 2007 while on a visit to our local library where it was being displayed on the “New in the Library” shelf.
I booked it at once. My first impression of the book was its weight which was quite a factor as that day I had decided to walk to the library. Weight bearing exercise is good, I kept telling myself all the way home.
I looked at the cover. Claim to the Country -The archive of Wilhelm Bleek and Lucy Lloyd. I immediately sensed that this book was something most precious and it felt as though I needed permission to read it. I wondered whether the library staff had not mistakenly put this book in the lending library instead of in the reference section.
In her introduction Pippa Skotnes writes:

“This book is the result of a twenty-year love affair with the archive. My intention has been to publish and index the major part of the archive. I have tried to present  the reader with something of the experience of being in the archive, of the physical presence of the documents, the shape of the pages, the colour and texture of their surfaces, the signs of use and age and fragility and the sheer volume of material it contains. To reveal how knowledge and understanding is never something that can be achieved alone, or just through one medium.To help better understand what it means for all of us that the people who lived in southern Africa long before any newer arrivals settled in the country, no longer survive through their language or culture or intellectual traditions. This book also tries to be a beautiful book.”

I must agree that this book is the one of the most beautiful academic books I have seen. Although I was able to borrow the copy from our library again and again, I decided to spare the heartache if I ever  had to see one page damaged and so Claim to the Country was placed number one on my wish list that Xmas.

(When you’re good your wishes come true – Claim to the Counrty now has its rightful place on my bookshelf!)

Courage and Rice

June 2010
When far away is closer to home than one thinks…..

courage-and-rice   David-Grier   David-Grier--Great-Wall
I have two special friends in Taiwan, who over the years, have painted a vivid picture of their surroundings via regular emails. Both are celebrating their birthdays this week and celebrations have included a trip to Taipei, I decided to pay a visit to the library’s travel section. The book I was looking for, was not available but another caught my eye.
Every now and then, I discover a book that for some reason blows my mind. The inscription on the spine was not easy to read for a spectacle in-betweener (I’m at the now-I-need-them, then-I-don’t stage) but this book in larger format than its neighbours and  vivid  red dust jacket was calling for closer inspection. I felt its weight, saw the minimalistic design and as I gently brushed my hand over the front cover I read:

courage and rice
my journey along the great wall of China
david grier. Continue reading →

Mao’s Last Dancer

22 Aug 2010
Mao's-Last-DancerMost days the post in my postbox is just the predictable, boring, paper-wasting stuff with occasionally something a bit more exciting like MNASSA or the Betty’s Bay Buzz but once in a blue moon there is the extremely rare, written letter or postcard but the biggest thrill is that little white slip that reads: collect at counter….. While waiting in the long queue I dream of all the possibilities.
One day out of the blue a parcel arrived from a Mr Andrew from Taiwan. I could not wait to see what was inside. I turned the first pages of a brand new book and my routine changed dramatically. By eight every evening I was tucked in bed engrossed in  the fascinating storie of a young Chinese peasant boy’s determination to become one of the world’s best dancers. Li Cunxin was to become Mao’s Last Dancer. Continue reading →