How to view the Sun safely - eclipses, sunspots

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How to view the Sun safely for solar eclipses or to see sunspots or faculae on the sun's surface. White light solar filters, solar projection options such as telescopic projection and pinhole projection, and unmagnified methods are all discussed. Unsafe ways to view the Sun are also part of the cautions presented, including the dangerous "eyepiece" solar filters that used to be part of many older telescope sets.
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16 май 2012

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Комментарии : 67

@seanstr26m123

I didn't think about the fact that you could line up the telescope with the shadow on the ground. My brain wasn't thinking three-dimensionally. Thank you.

@Eyesonthesky 12 лет назад

Yes, the Sun can blind you almost instantaneously.

@Eyesonthesky 12 лет назад

You're welcome! I did just a little bit in this week's regular video, and realized that there was a lot more I should have covered. This way it hits pretty much everything, I think.

@Eyesonthesky 12 лет назад

The problem is, "seeming to really dim things" doesn't mean that dangerous, eye-damaging light isn't reaching your eye. Just because the image of the Sun didn't hurt, does not mean that you didn't damage your eyes. Practice safe solar; use only #14 or another safe method, or view online. It isn't worth risking your eyesight.

@Eyesonthesky 12 лет назад

blobrana responded to this correctly in your other post, but I'll ad to it: If you use a solar filter, then yes. If not, remember that the lens of the camera will concentrate the light on the small CCD chip in your camera. That will destroy the pixels rather quickly. Best to use a pinhole projector - they are simple and inexpensive to make, and safe.

@Eyesonthesky 12 лет назад

It's not that it's more intense; it's that it is just *as* intense as when the Moon isn't covering it. There is enough sunlight reaching your eyes during an eclipse to still cause serious damage. Always better to err on the side of safety than wind up with temporary - or worse, permanent - eye damage.

@Eyesonthesky 11 лет назад

Thank you - that is some stock music purchased on at a stock media website. It is called "Building Suspense."

@Eyesonthesky 12 лет назад

Only for a *total* solar eclipse, and only naked eye, is my understanding - and even then, it is not advisable, because when the Moon exposes the Sun again, you can damage your eye. The one coming up this Sunday is an annular solar eclipse, meaning a part of the Sun's surface will still be visible, making it unsafe to view it directly at all times without a proper filter or other safe method.

@blobrana 12 лет назад

Indeed, dim is not always safe. Photographic film, for example, will dim the visible light, but lets though a lot (~50% ?) of the dangerous Infra-red light. Even some 'proper' solar filters do not block out IR light - only reduce it to 'acceptable' levels.

@ABitMadInTheHead 12 лет назад

why doesn't stacking the welder's glass work? I already just tried that before I knew not too and it seemed to really dim things with two 10's. I tried stacking 3 glasses together and I couldn't even see the sun anymore.

@greenglassrose 10 лет назад

To put the Solar filter in front of your eyes before you view the sun! great idea & Good advise ! learn something new ! Thank you .

@goldpanda97 11 лет назад

I think because your pupils adjust to the darkness (allow more light into the eye) however because it's just as intense it's worse than looking at it on a normal day because your eyes adjust differently.

@Eyesonthesky 12 лет назад

blobrana responded to this correctly in another post below, but I'll add to it: If you use a solar filter, then yes. If not, remember that the lens of the camera will concentrate the light on the small CCD chip in your camera. That will destroy the pixels rather quickly. Best to use a pinhole projector - they are simple and inexpensive to make, and safe.

@blobrana 12 лет назад

Yes, (with solar filters) that is the safest way - but best to ask permission first. ;)

@blobrana 12 лет назад

Of course, someone would for sure have used poptart wrappers for visual use and end up in hospital. Proper (and costing the same as poptarts) solar viewing eyeglasses (available from any telescope shop) can be used with the camera. BTW, next partial solar eclipse for you is on the 23rd October, 2014 and a superb total solar eclipse on the 21st August, 2017.

@spikelally1321 5 лет назад

Hey would some solar filter film be a lot better that some #14 welding glass

@MakeenSH 11 лет назад

New to astronomy and got really lucky to find this interesting and educational videos. Btw love youre theme song. Where did you get it? Thanks

@Eyesonthesky 12 лет назад

Yeah, when researching this I came across that and just thought, "Wow... really?" But you never know what kind of advice people get or ideas they come up with, so I figured I better include that.

@moeshickenyay 5 лет назад

What was the name of the Guy who did this instructional video.

@okazakikun1 12 лет назад

live in a small place dont have a shop like that.... i looked... was thinking amazon but by the time i new it was to late to ship espesally since the eclipse was on a sunday. i shall get a pair before hand thanks for the dates!