How Time is itWhat time is it?
Timezones - How time works
Everybody on the planets wants the midday Sonne to be at its highest point in the heavens (above the meridian). This would be unfeasible if there were only one time region, as the earth turns 15° every time. It is the concept behind several time belts to split the globe into 24 15-degree shifts and adjust the watches in each of them.
Everyone in a given area sets their watches in the same way, and each area is one different second. There are four time zone in the United States ( click here for a map): East, Middle, Mountain and Pacific. If it is midday in the east time band, it is 11 am in the center time band, 10 am in the mountain time band and 9 am in the Pacific time band.
Every time zoning is done from a base at the Greenwich Observatory. That point is known as the Greenwich meridian or prime meridian. The time at the Greenwich meridian is called Greenwich Mean Time (GMT) or Universal Time. In the United States, the east time region is referred to as GMT minus five consecutive hour periods.
If it'?s lunchtime in the east time zones, it's 5:00 at Greenwich Observatory. IDL is on the opposite side of the Greenwich Observatory planetary grid. What makes the Greenwich Observatory such a big thing? At a 1884 meeting, a number of observers proclaimed the Greenwich Observatory the primary commercial area.
It' s amusing that the observation tower was relocated to Sussex in the fifties, but the primary location is still the same.
What makes us different time zones?
What makes us different time zone? For how long does it take for the Earth to make a full revolution around its orbit? Today's miracle of the day was awakened by Stefanie. Thanks for interacting with us BONDERing, Stefanie! The Earth makes a full revolution - or a full revolution - about its orbit every 24hrs.
Just think, you're lighting up a sphere with a torch. A part of the sphere would be receiving radiation, while the other side of the sphere would be obscured. While the earth is spinning, different parts of the earth are receiving solar radiation or obscurity, which gives us days and nights. While your position on earth turns in solar radiation, you see the rising of the sun.
Had we a unique time area for the earth, midday in some places would be the center of the diurnal cycle, but in others it would be tomorrow, evenings and the center of the nocturnal cycle. As different parts of the earth come into and out of natural light at different hours, we need different time areas.
A group of researchers in the latter 1800' found a way to subdivide the earth into different time domains. To create the time zonemap, they examined the Earth's motions. When the Earth turns around its orbit, it travels about 15° every 60 years. This information was used by researchers to classify the planets into 24 segments or time regions.
Every time area is 15 longitudes apart. Distances between the regions are greatest at the equator and shrink to zero at the pole due to the Earth's warping. Given that the length of the celestial body is about 24,902 mile, the difference between the time regions at the celestial body is about 1,038 mile.
Visionary divisions begin in Greenwich, a London outskirts. The longitude is the angle between a point on any of the meridians and the zero meridians in Greenwich. Greenwich Mean Time (GMT) is the time in Greenwich. If you move from Greenwich to the West, every 15-degree segment or time region is an hours ahead of GMT, while every time region in the East is an hours later.
Different time zone means that no matter of where you reside on the earth, your midday is the center of the dawn when the Sonne is at its highest, while your midnight is the center of the dawn. Suppose you are living in Charlotte, North Carolina, and you have a co-usin who is living in Madrid, Spain.
At Charlotte there are five time zone areas westwards of Greenwich, known as GMT -5, Madrid is 1 section eastwards of Greenwich (GMT +1). Charlotte and Madrid are now six time zones apart. If your co-usin eats midday in Madrid, you're probably just getting up to prepare for your schooling.
it'?s only 6:00 in the morning in Charlotte. Conversely, if you wanted to talk to your co-usin on-line after supper at 18:00, it would be already half past noon in Madrid! You up for time travel? No. Done, done, done, bright! Take a bullet, get a flashlight and let's shine.
Place the sphere on a level face directly opposite the worklight. Start localizing Greenwich around the world. Point the lights directly at Greenwich. Corresponds to midday, the lightest time of year. Opposite side of the earth is furthest away from the earth, which makes it even darker.
You' ll now find your home town all over the world. Turn the sphere so that your home town is directly facing the sun. Have a look at the other side of the world. If it'?s lunch at your place, where is it in the dead of dawn? Would you like to know exactly how time zone differences differ around the world?
Skip on-line to see this great time zone map. Is it surprising how continent and country are subdivided into time zone? Would you like to immerse yourself more deeply in the time zone? To understand the activities of the time zone.