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NASA Image of the Day
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| The latest NASA "Image of the Day" image. |
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Composite of a Series of Images Taken From Space Aboard the Station
This is a composite of a series of images photographed from a mounted camera on the Earth-orbiting International Space Station, from approximately 240 miles above Earth. Space station hardware in the foreground includes the Mini-Research Module (MRM1, center) and a Russian Progress vehicle docked to the Pirs Docking Compartment (right). Expedition 31 Flight Engineer Don Pettit said of the photographic techniques used to achieve the images: "My star trail images are made by taking a time exposure of about 10 to 15 minutes. However, with modern digital cameras, 30 seconds is about the longest exposure possible, due to electronic detector noise effectively snowing out the image. To achieve the longer exposures I do what many amateur astronomers do. I take multiple 30-second exposures, then 'stack' them using imaging software, thus producing the longer exposure." A total of 47 images photographed by the astronaut-monitored stationary camera were combined to create this composite. Image Credit: NASA
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Townsville Astronomy Group
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Give us Back Our Dark Skies! |
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Written by Edward Kennedy
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Tuesday, 14 February 2012 18:26 |
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Well, here I go again! You may remember, or not, that I tackled this topic sometime ago. Well, seemingly nothing has happened or changed over cities and towns in North Queensland. The poor Milky Way is still barely visible and becoming less so every year while at the same time the powers that be, ‘god love em’ seen to prefer to light-up the underside of clouds and aircraft which pass overhead. I would not be surprised if they thought the ‘Milky Way’ was a road through a
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Written by Lex Howard
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Thursday, 17 November 2011 17:44 |
The sun is our ‘giver of life’ but it will take it very quickly if given cause, our friend and enemy, the governor of seasons and master weather maker-controller. Master irrigator, the sun can and does move vast amounts of moisture around our planet with impunity aided by wind currents etc.
In days gone by I have been astounded by the amount of water it could move or indeed remove from one of our major cities water supply dams – tens of millimetres in one day spread over the entire dams surface is one ‘heck’ of a lot of water.
If one was to take note of that sort of evaporation on a smaller water supply such as ‘farm’ dams for instance, the water loss can be catastrophic and in places over seas such as north eastern Africa, to mention only one spot (Ethiopia for instance) life is lost every day to thirst and dehydration. However, that same evaporation on a really grand scale is, in another location on earth the devastating flood that seems to generate and strike from nowhere.
Imagine if you would how much water is sucked skyward from a position such as ‘Lake Eyre’ in South Australia without mentioning of course the vast oceans that surround our planet. So couple ‘Sol’ with wind and other weather factors and you have life’s governor’s who are for ever at work somewhere on our planet. These forces can be managed
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Last Updated on Thursday, 17 November 2011 17:55 |
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Written by Lex
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Wednesday, 21 December 2011 09:06 |
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You may think about astronomy for awhile and then one morning you wake to the idea of scope ownership and what a great idea it is, but!!! There is a whole heap of things to be considered before you take that step towards purchase of your optical device. Firstly, is it a knee jerk reaction – have you recently viewed the galaxy (or a very small portion of it) in a friends ‘super’ telescope, possibly a 10-12 or 14” or maybe viewed a television documentary on the universe or some such. Please don’t get me wrong, in fact, join the club. Most of us start off in a similar fashion. You must however, realise that the image you were looking at was through a large aperture telescope or enhanced for TV and you won’t achieve that same image quality in a smaller instrument, or at least not immediately. My first telescope was indeed a ‘Tasco’ 60mm Refractor with a small battery motor on the RA Axis and when I eventually learned how to align it correctly on ‘Celestial South’ – the views of the Moon, Venus and Jupiter etc. simply blew me away. It wasn’t long though before my 60 odd year old eyes were yelling at me for a larger aperture device, which came along in the form of a ‘Skywatcher’ of slightly larger dimensions. My new scope was a 130mm, 1000mm Focal Length Newtonian which I enjoyed to the fullest. Suddenly my targets were clearer and the objects I viewed were larger and I reckon more detail was evident in the eyepiece. You can now see where I’m heading with this but more about my experience later.
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The Mystery of Our Universe |
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Written by Lex
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Sunday, 01 August 2010 10:12 |
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Questions abound regards its origin and most of them remain unanswered at least with any clarity or in a way that would make sense to the ordinary person. The dedicated stargazer at least starts to achieve some albeit, minor understanding of the vastness of what lies outside our super delicate atmosphere. In our small way with our study of the closer galaxies and nebulae we begin to understand how stars and planets in all their many and varied forms come to exist and for how long they endure in the hostile environment in which they spend their long lonesome lives.
In comparison if indeed one can be made in this case we the human race have been in existence for less than a blink in time and there is every chance that we won’t make it for as long as the shortest lived one of the abovementioned stars or their remains (the nebula) which I might add is one of our main targets to view at this point.
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Last Updated on Sunday, 01 August 2010 10:55 |
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Latest Posts
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 in Event Listings by Liz, 19-05-12 10:16
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