Latitude is a measure of distance north or south of the equator, which is an imaginary horizontal line around the exact mid-point of the earth between the 2 poles. The earth is divided up into 180 latitude lines on either side of the equator, called parallels. These parallels run horizontally around the earth, parallel to the equator. 90 of them are north of the equator, while the other 90 are south of it. Longitude is a measure of distance east or west of an imaginary vertical line that runs down the center of the globe from the North Pole to the South Pole, called the prime meridian. Longitude lines are a series of vertical lines from North Pole to the South Pole, also called meridians because every place touched by the same meridian have midday at the same time. There are 360 meridians on either side of the prime meridian, with 180 of them located east of the prime meridian, and the other 180 located to the west of it. The meridian on the opposite side of the earth from the prime meridian is called the anti-meridian. The measurements of latitude and longitude are usually expressed in degrees (°), minutes (′), or seconds (″). The entire distance from one parallel to another or one meridian to another is 1°. To produce even more accurate measurements, each degree can be further divided up into 60 minutes, and each minute into 60 seconds (for a total of 3,600 seconds per degree). Latitude and longitude are measured in degrees rather than absolute units of measurement (such as miles or kilometers) because the Earth is spherical. While the distance between degrees of latitude is constant (60 nautical miles or 111.12 km), the Earth’s shape causes the distance between degrees of longitude to decrease as you approach the poles. When measuring latitude in either direction, the equator is considered the starting point, at 0° latitude. Likewise, the prime meridian is the starting point for measures of longitude, representing 0° longitude. Every measure of latitude or longitude is expressed in terms of how far it is from the origin point in either direction.  For example, the North Pole is at 90°N, meaning it is 90° north of the equator. The antimeridian is at 180° either east or west from the prime meridian. The Great Sphinx of Giza in Egypt is located at 29°58′31″N, 31°8′15″E. This means it is just under 30° north of the equator in latitude, and about 31° east of the prime meridian in longitude.
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One-sentence summary -- Get familiar with the concept of latitude. Learn the definition of longitude. Examine the units of measurement used for latitude and longitude. Measure latitude and longitude relative to the 0 point.


You will want to confer with the couple to determine a date that is good for them. It is also a good idea to consider events that may be going on in your community when choosing a date. Consider the age of the couple and the age of the guests when deciding on a time. If the party is for an aged couple, you may want to set the time before dark.
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One-sentence summary -- Select a date to hold the anniversary party. Figure out the best time for the party.


Some enamel and acrylic paints will only need to dry for a long time in order for the paint to fully set. Leave them somewhere warm and dry for up to a week before using or displaying your painted glass. Always follow the manufacturer's guidelines when curing the paint. Some paints that dry to be cured can only be washed by hand with soap and warm water. Some paints will require you to bake your glass to fully cure it and set the paint forever. Put your glass in the oven and set it to the temperature stated on your paint bottle. Let the glass cure for around 30 minutes, before turning the oven off and leaving it to cool before removing it. Always put your glass into and remove it from a cool oven. Suddenly changing the temperature of the glass can cause it to break.
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One-sentence summary --
Cure your glass paint by leaving it to dry. Cure your glass paint by baking it.