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How are astronomers able to measure how far away a star is?
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It turns out that measuring the distance to a star is an interesting problem! Astronomers have come up with two different techniques to estimate how far away any given star is.
How to Repair Kitchen Equipment
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Make your kitchen feel like new with our instructions on sharpening knives and scissors; fixing china, porcelain, and glass; making a polish for brass, silver, and copper; and making new potholders out of old towels.
How RealD 3-D Works
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RealD 3-D optimizes the 3-D viewing experience. Find out how RealD takes on traditional 3-D.
How THX Works
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When you see the THX logo splashed across a movie screen, you know you're in for an audio feast. But what does that logo mean? Find out what THX is and why it improves your movie experience.
5 Miking Techniques and Tips
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Miking techniques are the start to a great recording. Learn about miking techniques to get the best sound out of your microphone in this article.
Will the Leaning Tower of Pisa ever fall?
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Pisa without its precariously tilted landmark is like San Francisco without the Golden Gate or London without Buckingham Palace. Will the peculiarly enduring tower ever vanish from the Italian skyline?
Ancient Babylonian Tablet May Show Early Trigonometry, But Some Experts Are Dubious
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A reinterpretation of an ancient Babylonian tablet shows that trigonometry might be 1,000 years older than thought. But there's some disagreement.
How Skycam Works
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How do broadcasters get those amazing shots of on-the-field action at sporting events? Thank Skycam. Find out how this marvel of camera tech works.
Radio Telescope Image Gallery
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The radio telescope pictures in this gallery feature observatories around the world. See radio telescope pictures and the astronomers who use them.
Ronald Reagan Sees a UFO
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The Ronald Reagan UFO sighting occurred in 1974 while Reagan was flying to Bakersfield, California. Reagan told a reporter afterwards, but hasn't discussed the event since. Learn more about the Ronald Reagan UFO sighting.