(Video and images credit: NASA and George Mason University)
Posted on 06/15/2011 7:49:53 AM PDT by decimon
FAIRFAX, Va., June 15, 2011—George Mason University scientists discovered recently that a phenomenon called a giant magnetic rope is the cause of solar storms. Confirming the existence of this formation is a key first step in helping to mitigate the adverse effects that solar storm eruptions can have on satellite communications on Earth.
The discovery was made by associate professor Jie Zhang and his graduate student Xin Cheng using images from the NASA Solar Dynamic Observatory (SDO) spacecraft.
Though the magnetic rope was believed to be the cause of these giant eruptions on the Sun, scientists had previously not been able to prove this phenomenon existed because of how quickly the rope moves.
However, through close examination of images taken by the Atmospheric Imaging Assembly (AIA) telescope on board the SDO, Zhang was able to pinpoint an area of the sun where a magnetic rope was forming. The AIA telescope suite is able to capture images of the Sun every 10 seconds, 24 hours a day. This unprecedented cadence in time helped the discovery.
"The magnetic rope triggers a solar eruption. Scientists have been debating whether or not this magnetic rope exists before a solar eruption. I believe that the result of this excellent observation helps finally solve this controversial issue," says Zhang.
(Excerpt) Read more at eagle.gmu.edu ...
(Video and images credit: NASA and George Mason University)
The image in comment #1 is 1,073,782 bytes at both its original, full size and at my scaled-down size. Anyone know how to reduce both the dimensional and byte size of a linked image?
Rope and throw and brand ‘em ping.
>>The image in comment #1 is 1,073,782 bytes at both its original, full size and at my scaled-down size. Anyone know how to reduce both the dimensional and byte size of a linked image?<<
The fastest way I know is to use the reduce options in Photobucket. I don’t know if there is an HTML way, but I will be interested if anyone comes up with one..
“Grope on a rope” bump...
That would work but it is work and would likely violate copyrights.
There is no obvious HTML way to reduce the byte count. This would require some server-side processing to generate a thumbnail and send it to the browser. HTML can only control width=... and height=... of the image that has been already downloaded.
Maybe of interest to your ping list?
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You mean, load it in, scale it, and host it somewhere?
Or just using HTML tags?
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That.
I should have just posted the full-sized image, which is impressive, as it's the same size in terms of bytes.
Some FReepers are stuck with dial-up and others have monthly bandwidth limits so reducing the bandwidth of the many pictures posted would be a good thing.
And this image is smaller in size but zoomed in more.
Here is your original image in native size.
I'm not aware of any way without a photo editor of some kind, possibly MS Paint even, to change the physical size and resolution(number of bytes or pixels/inch). Also the various formats available for pics offer different compressions, eg, JPG's will typically yield greater compression than, say, PNG format. FWIW, PhotoShop can do it all in a matter of a few minutes. THEN you would need to host it somewhere and create a link to the newly hosted pic.
Just for grins, a radically compressed version:
Yup. And it's the same byte size as the reduced image I posted.
Thanks.
That’s the idea as it’s but a fraction of the byte size of what I posted. It’s enough for the thread and anyone interested in the full image can simply go to the link.
They don't need to go to the link since post 14 displays the image in native size. You should understand that once an image is loaded onto the computer it does not need to be reloaded no matter how many times it is displayed on a web page, different image properties notwithstanding. In fact if you desired you could re-reference the image and alter the dimensions so as to zoom in.(but it is easier, if using internet explorer, to simply press control and "+" to zoom the page.)
And that's a problem for people om dial-up or with monthly bandwidth limits.
You misunderstand. It is not a problem since they loaded the entire file when your initial link was encountered. The only way to prevent the transfer of the large file is to not refer to it. Despite the size you had the webpage display the image was loaded to the viewer's computer when your 'img src="http://spaceweather.gmu.edu/press/Figure_1_SDO_171_Full_Size.png" ' was encountered. Once loaded to the viewer's computer it could be displayed any number of times on the same webpage without downloading the file any more times. When I referenced the same picture in my post no subsequent download of the file was required since you had already referenced it. However the smaller image in post 15 required a download since it was a different file(http://www.eastex.net/rappaw/new/SDO_171.jpg) much smaller, but a different file.
The upshot is that the bandwidth limit was only influenced by your initial reference to that picture. I added additional bandwidth when I referenced a new picture, but not when I re-referenced the image you had initially referenced. In any case, people with bandwidth problems can turn off pictures as an internet option if they use internet explorer.
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