So, take care and protect yourself from the Sun! Wear sunglasses on sunny days to protect your eyes from excessive UV. Make a safe Sun-Earth Connection when you are outdoors. If properly protected, there ARE ways to look at the Sun. We can project it onto paper or even look at it through a telescope with solar filters. For direct viewing you can use an arc-welder's glass of shade 14 NOT a lower-numbered shade or special "eclipse glasses".
High-quality and safe but inexpensive eclipse glasses are available from Thousand Oaks Optical and Rainbow Symphony , both U.
The best views are through a properly-filtered telescope. See if the Kern Astronomical Society will have solar-filtered telescopes set out at a local viewing spot for you to look through—see the KAS website for when and where. The solar filters come as either wispy sheets of metallized film, metallized black polymer plastic, or metallized glass with the metallized film ones usually providing the very best view but all being very good. These filters fit over the front of the telescope or binoculars.
Do NOT use small filters that fit over the eyepiece since the magnified and concentrated sun's energy can easily shatter an eyepiece filter and then fry your eyeball.
Below are some pictures I took with a solar filter of metallized film over a mm telephoto lens with a 1. Select the images to bring up a full-size image. Stats for your observing location: You can get the stats for any other city in the U. Note that it does not know about daylight savings, so you have to subtract an hour from the "Time Zone" button before selecting the century button e.
A big telescope lets in a lot of sunlight, which poses the risk of overheating internal components. So either use a telescope with an aperture no larger than 4 inches or, for larger apertures, use an opaque mask over the Sunward-pointing end with a 3- to 4-inch-wide hole in it.
Aim the telescope in the general direction of the Sun without looking at the Sun through the telescope! Whether you're projecting with binoculars or a telescope, using a sunshade to block ambient light from falling on the projection surface will improve how you look at the sun. Filtered telescopes can capture fantastic detail around sunspots such as granulation, the small cells resulting from the boiling motion of gas on the surface of the Sun.
Make sure to avoid any filter that is placed at the eyepiece end of the scope. The concentrated sunlight will probably destroy such a filter, followed shortly thereafter by your vision. The easiest and least expensive option is to use a sheet of solar-filter material specially made for telescope use. Make sure to place the filter material at the front end of your telescope, and to cover the entire opening. If you plan to use a large telescope, no problem — simply create a mask with a 3- or 4-inch-wide hole and cover the hole with your filter material.
Here's a list of suppliers. They allow you to gaze at the Sun for hours with no risk whatsoever. Make sure your filter is securely attached to the front of the scope, so there is zero possibility that it will come off while viewing. And to avoid damaging your finderscope, either remove it or place a cap or solar filter at its front end. Also note that safe solar filters work equally well with binoculars.
This stunning image of a sunspot group and prominence was shot through a Solarmax mm scope with a calcium-K filter. These are typically small refractors with modest apertures, 40 to 60 mm across, that have special built-in interference filters.
It's also possible to buy filter sets that attach to the front end of a refractor's tube. Save Dark Skies. By: Diana Hannikainen November 11, By: Bob King November 10, By: Camille M.
Carlisle November 9, By: Alan MacRobert November 5, Astronomy and Society.
0コメント