# Department of Science & Math

E = mc²

Science journals of interest: Scientific American - Nature - New Scientist - Science AAAS - Science Daily

LAST EDITED: March 17, 2015

Yeano's thread: Proving Something is Independent of our Axioms.
Yeano's thread: Algebraic Topology and Model Theory

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This is the Sun...
Posted: Posted March 2nd by Louis De Pointe du Lac
 Recently got a solar filter so I can see the sun through my telescope and catch & record sunspots. Unfortunately the solar weather happens to be very calm at the moment. The camera lens didn't catch anything, however looking at it with my own eyes I was able to see a very tiny cluster of dots. And yes I did clean my camera lens after this.
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Nice! How much did the solar filter cost? Been thinking about getting one for mine.

Posted March 2nd by Jet Presto
Jet Presto

Thanks! There are cheap ones but since my eyes are on the line I purposely bought a moderately priced one at 60 US dollars. However I have seen them go as low as $17 and as high as$350. Be sure you know the size of your telescope barrel before buying one though! They have size ranges but its not one-size-fits-all.

Also one thing I learned is you might want to order a decent pair of solar eclipse glasses too. One of the biggest headaches in aiming the telescope at the sun is getting around the danger of looking at it.

Edited March 2nd by Louis De Pointe du Lac
Louis De Pointe du Lac
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