Time

What is Sidereal Time?

You’ve heard of standard time, aka solar time, but what the heck is sidereal time?  Isn’t time just time/ Yes it is but its all about how you measure it. Simply put, it is responsible for measuring the rotation of the Earth relative to the stars instead of the sun. Astronomers use it for time keeping without referencing the Earth’s motion around the Sun. Sidereal time is also used for satellite related time calculations, where a type of universe time is needed instead of the one that is purely Sun or Earth based. Sidereal time is also how astronomers define the rotations periods of other planets.  By using sidereal time, you can figure out how fast the planet is actually

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Time

What Does AM and PM Stand for?

Some countries use the 12-hour time format including the United States. This clock format also includes the abbreviations, AM and PM. Before the modern era, the only way to tell the time is by the sun’s position. Now, we are using digital clocks to track our daily activities, as well as to save time. So, what do AM and PM stand for and what does telling the time have to do with them? Two 12-Hour Periods The 12-hour system equally divides the 24 hours in a day into two periods, having 12 hours in each division. The first 12 hours in the division is designated as AM, which runs from midnight to noon. The second 12-hour period is marked as

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The History of Time Zones
Time

The History of Time Zones

Looking back to the time when clocks were non-existent, people used different devices such as sundials and water clocks to tell what time it is. In the 17th century, the pendulum was invented but it wasn’t that accurate especially when being used at sea. That is the reason why the Chronometer was introduced. It measured the time more accurately even when there is movement and in varying conditions as well. When well-regulated clocks were invented, each city set the time depending on the sunrise, or their own solar time. They did not pay much attention if the time was not accurate compared to other places since it was of long travel times and lack of long-distance communications. But, have you

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Interesting Facts About Time
Time

Interesting Facts About Time

Time is one of the things we rely on in keeping track of our daily activities. But did you know that there are a lot more about it than we all had known? Here are some interesting facts about time that you probably haven’t heard about: While in a standing position, time passes faster for your face than for your feet. As explained in Einstein’s theory of relativity, the closer you are to the center of the Earth, the slower time goes. A day isn’t really 24 hours. The Earth takes exactly 23 hours, 56 minutes, and 4.2 seconds to rotate. This is measured in something called “Sidereal” time – It only becomes 24 hours because due to its orbit

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Evolution-of-the-Digital-Clock
Time

Evolution of the Digital Clock

When you think of the word “digital” we typically think of computers and data and graphics that are all driven off of data stored in 1 and 0 digits.  A digital clock is a type of clock that displays the time in numerals (digits) versus based on the positions of rotating mechanical hands.  The digital part doesn’t relate to the power/drive mechanism or how the clock is derives the current time. Most digital clocks typically use the 50 or 60 hertz oscillation of AC power or a 32,768 hertz crystal oscillator as in a quartz clock to keep time.  This is the mechanism that is used to drive the tracking and passing of time for the clock display.  So instead of pulleys and weights or springs and other mechanisms its based

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How Did People Wake Up Before Modern Alarm Clocks?
Time

How Did People Wake Up Before Modern Alarm Clocks?

The need to know exactly what time it is or to be sure you arrive on time is an ancient one.  In our modern society its hard to imagine not knowing the current time and when the next appointment is and if your going to be on time or not.  Knowing the current time and being alerted when you have something to do seems as common place as eating or sleeping.  Its just part of our lives. That wasn’t always the case and before our world of modern technology people went to great lengths to be alerted to the current time or make sure they woke up to make it to work.  Here are some of the more common ways

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Online Alarm Clocks and Timers Can be Very Useful Tools
Time

Online Alarm Clocks and Timers Can be Very Useful Tools

It wasn’t so long ago in human history where having  clock at the center of the town was the best way to know the current time. The chimes would alert the current time.  And before that the venerable sun dial was the best way to see the passing of time beyond watching the sun and moon. Even Plato had needed of a water alarm clock to wake him up on time for is famous lectures.  Levi Hutchins, an American, is the first inventor of a mechanical alarm clock in the late 1700s.  There have even been some crazy alarm clock inventions such as John Muir’s Clockwork Desk and Bed.  The bed would start to slide him out of bed at

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How Does Olympic Timing Work
Time

How Does Olympic Timing Work?

When you think of the Olympic race where the sprinters are all right at the finish line and one barely crosses ahead of the others. You then learn that a new world record has been set by 2 100th of a second – wow! Your next thought may well be how do they know that? Thats an extremely small amount of time. To be able to track and time these extremely minute time intervals various equipment has to be employed including high-speed digital cameras, infrared sensors, and a myriad of other devices. With these timing tools the measurements can be accurate all the way down to one-millionth of a second which is a microsecond. How fast is a microsecond? An

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