Thinking About: Consumerism
Welcome to the thoughts that wash up on the sandy beaches on my mind. Paddling is encouraged.. but watch out for the sharks.
About Me
- CyberKitten
- I have a burning need to know stuff and I love asking awkward questions.
Monday, October 31, 2011
Sunday, October 30, 2011
Saturday, October 29, 2011
NASA's Spitzer Spots Clump of Swirling Planetary
Material
From NASA
Sept. 23, 2009
Planets form out of swirling disks of gas and dust. Spitzer observed infrared light coming from one such disk around a young star, called LRLL 31, over a period of five months. To the astronomers' surprise, the light varied in unexpected ways, and in as little time as one week. Planets take millions of years to form, so it's rare to see anything change on time scales we humans can perceive. One possible explanation is that a close companion to the star -- either a star or a developing planet -- could be shoving planet-forming material together, causing its thickness to vary as it spins around the star.
"We don't know if planets have formed, or will form, but we are gaining a better understanding of the properties and dynamics of the fine dust that could either become, or indirectly shape, a planet," said James Muzerolle of the Space Telescope Science Institute, Baltimore, Md. Muzerolle is first author of a paper accepted for publication in the Astrophysical Journal Letters. "This is a unique, real-time glimpse into the lengthy process of building planets."
One theory of planet formation suggests that planets start out as dusty grains swirling around a star in a disk. They slowly bulk up in size, collecting more and more mass like sticky snow. As the planets get bigger and bigger, they carve out gaps in the dust, until a so-called transitional disk takes shape with a large doughnut-like hole at its center. Over time, this disk fades and a new type of disk emerges, made up of debris from collisions between planets, asteroids and comets. Ultimately, a more settled, mature solar system like our own forms. Before Spitzer was launched in 2003, only a few transitional disks with gaps or holes were known. With Spitzer's improved infrared vision, dozens have now been found. The space telescope sensed the warm glow of the disks and indirectly mapped out their structures.
Muzerolle and his team set out to study a family of young stars, many with known transitional disks. The stars are about two to three million years old and about 1,000 light-years away, in the IC 348 star-forming region of the constellation Perseus. A few of the stars showed surprising hints of variations. The astronomers followed up on one, LRLL 31, studying the star over five months with all three of Spitzer's instruments. The observations showed that light from the inner region of the star's disk changes every few weeks, and, in one instance, in only one week. "Transition disks are rare enough, so to see one with this type of variability is really exciting," said co-author Kevin Flaherty of the
Both the intensity and the wavelength of infrared light varied over time. For instance, when the amount of light seen at shorter wavelengths went up, the brightness at longer wavelengths went down, and vice versa. Muzerolle and his team say that a companion to the star, circling in a gap in the system's disk, could explain the data. "A companion in the gap of an almost edge-on disk would periodically change the height of the inner disk rim as it circles around the star: a higher rim would emit more light at shorter wavelengths because it is larger and hot, but at the same time, the high rim would shadow the cool material of the outer disk, causing a decrease in the longer-wavelength light. A low rim would do the opposite. This is exactly what we observe in our data," said Elise Furlan, a co-author from NASA's Jet Propulsion Laboratory,
The companion would have to be close in order to move the material around so fast -- about one-tenth the distance between Earth and the sun. The astronomers plan to follow up with ground-based telescopes to see if a companion is tugging on the star hard enough to be perceived. Spitzer will also observe the system again in its "warm" mission to see if the changes are periodic, as would be expected with an orbiting companion. Spitzer ran out of coolant in May of this year, and is now operating at a slightly warmer temperature with two infrared channels still functioning.
"For astronomers, watching anything in real-time is exciting," said Muzerolle. "It's like we're biologists getting to watch cells grow in a petri dish, only our specimen is light-years away."
Friday, October 28, 2011
Thursday, October 27, 2011
Just Finished Reading :
The History of Life – A Very Short Introduction by Michael J Benton
Even I’m thinking that I should be reading science based
books other than from the, actually excellent, VSI Series. Anyway we are were
we are [grin].
As the book covers the last 4 billion years of life on Earth
in 166 pages you would be correct if you referred to it as a bit of a romp.
Rather sensibly the author decided to hit the highlights, or rather the turning
points, in evolution starting naturally with the origin of life itself. Of
course we know very little about this – or at least there is little confirmed
knowledge of the event (or more likely series of events) – so he’s forced to
speculate. After that he moves onto the more understood origin of that most important
aspect of life – sex. The sharing of genes and the subsequent explosion in
variation greatly increased the speed of evolution and the diversification of
all types of life. The next highlight was the origin of skeletons. An internal
support structure allowed larger creatures to appear and laid the ground work
(pun intended) for the next leap forward – the invasion of the land. The author
then moved onto flight before exploring several of the mass extinctions that
seem to periodically almost wipe the slate clean. They are deeply fascinating
events and, if the figures hold up, we may in fact be living through another
mass extinction event right now. The last two chapters covered the rise of
modern ecosystems – in the form that most of us would recognise and, rather
inevitably, ended with the origin of humans.
Wednesday, October 26, 2011
Tuesday, October 25, 2011
Monday, October 24, 2011
Just Finished Reading :
Classical Mythology – A Very Short Introduction by Helen Morales
I have been interested and often fascinated by Myth for as
long as I can remember. I think I grew up hearing about and then reading about
Norse and Greek myths before I knew exactly what they were or what they meant.
I’m guessing that’s something else I can thank my father for.
This excellent little volume isn’t one of those that retells
or catalogues the myths of the ancient world. There are certainly enough of
those around and the already crowded market doesn’t need another. What this
well written, thoughtful and sometimes surprising book does is look at where
myth comes from, what it means to those who create it – and live inside it –
and how it shaped both the ancient and the modern world. Starting with the
Greek myth of Europa the author shows how the original Greek tale has been
modified, reinterpreted and used by political movements (and others) as a
metaphorical social glue to advance their idea of Europe
– both to its inhabitants and to the rest of the world. Of course myths have
always been pliable, able to be moulded to the needs of those who would seek to
use them to influence others or simply to make money (from, for example,
Hollywood blockbusters). Purists protest at this lack of ‘mythological
correctness’ but variations on a theme has always played its part in classical
mythology. After all they have come down to us literally by word of mouth and no
one version can be viewed as ‘gospel’. Without giving a synopsis of the whole
book I’d have to focus on several chapters I found particularly interesting.
One was on heroes which are a particular interest of mine at the moment in
which the author digs deep into what makes and, of equal importance, what does
not make someone a hero. The other was on sex and sexuality in classical myth
(quite a lot as anyone who has read Greek mythology will know) and how this has
often been covered up – quite literally in the many mythic paintings adorning
the walls of galleries around the world – and how the often sanitised versions
presented today make much less sense compared to the original unexpurgated
versions.
Sunday, October 23, 2011
Saturday, October 22, 2011
V for Vendetta masks: Who's behind them?
From The BBC
20 October 2011
From New York , to London , to Sydney , to Cologne , to Bucharest ,
there has been a wave of protests against politicians, banks and financial
institutions. Anybody watching coverage of the demonstrations may have been
struck by a repeated motif - a strangely stylised mask of Guy Fawkes with a
moustache and pointy beard. Wikileaks founder Julian Assange arrived at the
Occupy London Stock Exchange protest to make a speech wearing one of these
masks. He took it off, reportedly at the insistence of the police. They were
thought to have been used first by the notorious hacker-activist group
Anonymous in 2008 during a protest against Scientology, but have since spread
throughout the global protest movement.
The masks are from the 2006 film V for Vendetta where one is
worn by an enigmatic lone anarchist who, in the graphic novel on which it is
based, uses Fawkes as a role model in his quest to end the rule of a fictional
fascist party in the UK .
Early in the book V destroys the Houses of Parliament by blowing it up,
something Fawkes had planned and failed to do in 1605. British graphic novel
artist David Lloyd is the man who created the original image of the mask for a
comic strip written by Alan Moore. Lloyd compares its use by protesters to the
way Alberto Korda's famous photograph of Argentine revolutionary Che Guevara
became a fashionable symbol for young people across the world. "The Guy
Fawkes mask has now become a common brand and a convenient placard to use in
protest against tyranny - and I'm happy with people using it, it seems quite
unique, an icon of popular culture being used this way," he says. A
curious Lloyd visited the Occupy Wall Street protest in Zuccotti Park ,
New York ,
to have a look at some of the people wearing his mask. "My feeling is the
Anonymous group needed an all-purpose image to hide their identity and also
symbolise that they stand for individualism - V for Vendetta is a story about
one person against the system." The film of V for Vendetta ends with an image of a crowd of
Londoners all wearing Guy Fawkes masks, unarmed and marching on parliament. It
is that image of collective identification and simultaneous anonymity that is
appealing to Anonymous and other groups, says Rich Johnston, a commentator on
the world of comics. The widespread adoption of the masks was definitely a
reaction to the film rather than the book, he argues. "The book is about
one man bringing down the state but the film includes a scene of a huge crowd -
making a statement against a faceless corporation."
"The masks were useful for the Scientology protests
because it prevented individuals from being recognised," he adds. Lloyd
said that when he and writer Moore created the character of V they had a basic
idea of an urban guerrilla fighting a fascist dictatorship but wanted to inject
more theatricality into the story. The mask is bought even in countries where
Guy Fawkes is not such a well-known figure "We knew that V was going to be
an escapee from a concentration camp where he had been subjected to medical
experiments but then I had the idea that in his craziness he would decide to
adopt the persona and mission of Guy Fawkes - our great historical
revolutionary."
The masks were originally made by Warner Bros to promote the
film and were handed out at screenings. Now they are being sold to everyone
from activists to fancy dress enthusiasts. Rubies Costume Company, which makes
the mask, sells around 100,000 a year worldwide, and 16,000 in the UK, according
to spokesman Steve Kitt, who seems a little concerned that any association with
activists might harm the company's image. Rubies is dismissive of the idea that
Anonymous and other protesters have fuelled demand for the mask, saying it has
been successful ever since the film was released. Wikileaks founder Julian
Assange has been associated with the V imagery Lloyd says he has already heard
anecdotes about police in the US searching for the masks in people's houses to
be used as evidence of involvement with Anonymous hacker attacks, "which
is scary but also ridiculous - you wouldn't prosecute someone for having a
t-shirt with Che or CND on it".
Friday, October 21, 2011
Thursday, October 20, 2011
Just Finished Reading : The
Sword of Albion by Mark Chadbourn
Will Swyfte is a national hero. Stories are written about
him in the penny dreadfuls that circulate on the streets and in the taverns all
over England .
People sleep safe in their beds knowing that he stands between England and her
many enemies. But the propaganda hero is only half the story. If England knew of
the other half there would be Hell to pay. Will is in the employ of England ’s
greatest Spymaster – Sir Francis Walshingham. Dedicated to protect England from
enemies both foreign and domestic he uses whatever methods he has at his
disposal to protect the country and the newly installed Queen Elizabeth. Things
are looking grim when the Spanish plan to invade and conquer England is
uncovered. Elizabeth ’s treasury is empty of gold
and most of Europe is dedicated to her
downfall. But even greater dangers are abroad in the night. England faces
an enemy far more dangerous than the might of the Spanish Armada – a vicious
and unfeeling enemy who has prayed on humanity since the dawn of time and who
have decided that the English must be expunged from the world forever: The Fey.
When Walshingham learns of a new super-weapon that the Fey intend turning over
to the Spanish he sets Will and the other spies privy to the secret war within
a war to stop it falling into their enemies hands – but how do you fight
supernatural beings with nothing more that wits and cold steel?
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