Talk centres on the sun
THAT elusive summer visitor — the sun — will be the centre of attention at the next Swansea Astronomical Society event.
The society is holding a solar observation day in the National Botanic Gardens in Llanarthne on Sunday giving people the chance to learn more about our nearest star.
The day runs from 11am to 5pm.
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Comments
by Philosoraptor
Thursday, August 02 2012, 8:32AM
“Just a couple of things this will not likely cover, although I will be telling my family about this so the young ones can go:
The sun outputs two types of UV light that damages the human body. UVA and UVB.
UVA is the cause of deflating calogen under the top layer of skin and leads to wrinkles.
UVB is the cause of sunburn.
While car and bus windows can stop UVB entering the cabin where driver and passengers are, the UVA continues through with no problem so depending on how you want to look when you are older... a UVA blocking sunscreen is sometimes recommended when on long haul journeys.
The breakdown of calogen is often seen as a vanity affair but it can lead to further complications such as lack of stretching capability of the skin tissue, those most affected tend to be bus drivers, taxi drivers and lorry drivers who will usually admit they don't get burnt when the windows are up but they do notice their skin ageing quicker than it should have done.
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Now on topic of the event, if you don't know much about our Star then by goodness get over there and learn some of the amazingly wild things about it. For instance, our Star is amazingly big... so big it is impossible to actually imagine and if you think you can do that, then scientists say you have not grapsed just how big the thing really is.
For instance, if you were flying on a Airbus A380 it would take 20.5 hours non-stop to fly between London and Sydney at cruise altitude, and it would take a further 23 hours to carry on and end up back at London.
In comparison flying in a A380 at the same cruise altitude across the sun would take you 205 days of non-stop travelling at the speed of over 600 miles per hour. That is providing you the plane is not turned instantly from metal to gas due to the immense heat which would bypass the melting stage altogether, and before even the heat affect could occur the immense gravitation forces would squeeze the plane to less than a 1/100th of a meter tall. If it was a cool, solid structure it would still be impossible to for us to live in... we would weigh over a tonne in weight and our body cannot handle the stresses that come with that
Enjoy this event if you go, some of the things we know now are insane. :)”