Question by Malevolence: Can Staring at an Eclipse Really make you go Blind?
Can it make you go blind or just hurt your eyes? Temporary blindness or permanent? And can video taping an Eclipse, looking at the eclipse through a camera lense blind you aswell?
Best answer:
Answer by Guru HankPERMANENT.
Even after a very short exposure, and even when the eclipse is near total. There have been mass tragedies following some eclipses in parts of the world where this was not widely understood. You might not notice the damage has occurred until later. It would then be too late. Never look at the sun directly even part of it, for an instant.
Make a tiny pinhole in a piece of black card, and WITH YOUR BACK TO THE SUN project the light which shines through this onto another piece of card. You will get an image of the solar eclipse as it occurs. Do not risk messing around with bits of 'smoked glass' and other gimmicks like some teachers did with a class when I was a kid. You always end up getting a dangerous exposure.
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About Lunar and Solar Eclipses Come See the Accompanying Article at KidsKnowIt.com: www.kidsastronomy.com
Video Rating: 4 / 5
Friday, February 22, 2013
Can Staring at an Eclipse Really make you go Blind?
Is there anyone trying to create a cheaper and more efficient solar panel?
Question by Estr Bien Cvzoch: Is there anyone trying to create a cheaper and more efficient solar panel?
I read on CNN's website last year some company was creating a very cheap type of solar panel, that needs minimal maintenance and and has minimal glare from the sun. And the creator of the project said he one day wanted to cover every rooftop in the US with these solar panels. Seems like a good idea to me but I havent heared anything of it for a long time and I don't know what they are called... any help?
Best answer:
Answer by Dominic Fno i havent heard of it but domestic solar energy is new and as the demand for it increases and the technology becomes more easily to produce the price will come down. just like tv,mobile phones, computers and appliances.
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At the solar industry's largest event, Intersolar Europe, 2011 SunPower launched its new 96-cell E20 modules, which are the industry's first commercially-available solar panels to achieve total area efficiencies of 20% and above. Jorn Jugens, SunPower's managing director, Germany had the honour of discussing with PV-Tech the key characteristics of the module, which includes SunPower's 22.4% efficient 'Maxeon' cell technology. The modules will be offered in Europe and Australia this year, with availability extended in North America and Asia in early 2012. All of SunPowers production lines will be transferred to the new Maxeon cell process by mid-next year.
Video Rating: 5 / 5
Thursday, February 21, 2013
When was the last time a full lunar eclipse happened on winter solstice?
Question by Michael Lamb: When was the last time a full lunar eclipse happened on winter solstice?
There is a full lunar eclipse on December 21, the winter solstice. When was the last time a full lunar eclipse happened on the same day as the winter solstice?
Thanks everyone. I figured it out. 1638 is the last time a total lunar eclipse happened on the winter solstice. 362 years ago. Awesome.
Best answer:
Answer by Nyx1999 -
http://home.earthlink.net/~jcmannone/sitebuildercontent/sitebuilderfiles/wintersolsticefullmoon.pdf
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When the moon passes through the Earth's shadow, it causes the moon to look very unusual for a short period of time. This event is called a lunar eclipse, and it occurs roughly twice a year. Learn more about how lunar eclipses work in this video! This video is public domain and can be downloaded at: svs.gsfc.nasa.gov Like our videos? Subscribe to NASA's Goddard Shorts HD podcast: svs.gsfc.nasa.gov Or find NASA Goddard Space Flight Center on Facebook: www.facebook.com Or find us on Twitter: twitter.com
Video Rating: 4 / 5