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Q&A for How to Make a Sundial
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QuestionCan I use a flat, circular board instead of a paper plate?Community AnswerYes, of course! In fact, the flat, cardboard circles used to put under cakes are perfect for this!
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QuestionCan I use a torch instead of sunlight?Community AnswerNo, because a torch does not rotate around the sundial like the earth does around the sun. A sundial use the earth's rotation around the sun like a clock -- when the sun moves, so does the shadow.
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QuestionHow far should the gnomon be slanting towards the closest celestial pole in degrees if 90 is directly up?Community AnswerSubtract your latitude from 90 to get the slant degree. I am at 41.25 N latitude, so my sun dial slant is at 48.75 degrees. Rounding off to the nearest degree should work fine.
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QuestionIs it best to use "true" north on a compass?MusicIsEverywhereCommunity AnswerTrue North on a compass with not point geographically North, like the sun's shadow at noon would point. This is because the magnetic North pole and the geographic North pole are two different places on the Earth's globe.
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QuestionCan I show minutes on a sundial?MusicIsEverywhereCommunity AnswerIt is not practical to show minutes on a sundial. It would be very tedious and time-consuming to return to the sundial every minute to mark the minute. Also, it would be impossible to fit every single minute of the day around the edge of the sundial.
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QuestionFor method three, does the size of the circle matter?Community AnswerNo, the size of the circle doesn't matter.
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QuestionCan I mark the numbers at an equal distance?Community AnswerYou can use a protractor to mark an hour every 30 degrees. As long as the number 12 and the straw in the middle of the plate are facing north, it should be fairly accurate.
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QuestionHow do I know if the 6 am and 6 pm lines are horizontal?Community AnswerUse a ruler, because it will allow you to determine if it truly is a 180-degree angle.
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QuestionCould I just measure the distance between the spaces of the first six hours, then just place the pebbles in the correlating spaces for the next 6 hours, cutting the time needed in half?Community AnswerThe angles are different for each hour, so it would be incorrect if you did that.
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QuestionHow do I find the celestial pole?Community AnswerPut a stick in the ground and mark the end of the shadow with a rock. Return approximately 20 minutes later and mark the new location of the shadow. True North will be halfway between those 2 points.
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QuestionDoes the time I put on a sundial matter?Community AnswerNo, but it won’t work once the sun sets! Sundials need the sun in order to cast a shadow. Just make sure that what you write is in the right spot.
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QuestionDo the seasons affect a sundial?Community AnswerYes, the length of the shadow is affected by the seasons.
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QuestionCan I make it inside with my light?Community AnswerNo, you cannot. Indoor light does not move, so the shadow will stay in the same place.
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QuestionHow do I position my sundial?Community Answeryou position the sun dial so that one end of the stick is directly in the middle of your base and then slant it to the hemisphere opposite of the one you are in.
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QuestionCan I make a small sundial to wear on my wrist or ankle?Community AnswerIt wouldn't work unless you had it oriented correctly. There are sundials that are portable, but you don't wear them on your wrist or ankle -- search for shepherd's dial or cylinder dial.
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QuestionHow does the latitude affect in making sundial?Community AnswerThe sun is seen from a different perspective depending on your latitude, so the shadow will be in a different place.
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QuestionWhich side do I slant if I am north?Community AnswerSlant the pencil towards the north if you are north and if you are south, slant it towards the south.
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