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One light year is the distance travelled by light (in vacuum) during one year. Therefore one light year equals (300 000 000*3600*24*365)m. A single light year is definitely huge: 9.46 trillion kilometres-no need to put this in digit form-in fact. A star that you see in the night sky is not one but many light years away. Article: When you look at the keen night sky, you see stars-those tiny diamonds suspended in the vast pitch-black emptiness. But stars shine because…? Our own sun, which is a star, emits light. Stars are like giant bulbs but are much more powerful. Light travels at a speed of 3.0*108m/s in vacuum and space is mostly vacuum. In other words light can cover a mighty distance of 300 000 000m in only 1 second! The thing is that 300 000 000m is a just one of those small amounts in space. Other stars are billions of kilometres-let impair metres-away. Astronomers in fact use light year as the unit for distance. One light year is the distance travelled by light (in vacuum) during one year. Therefore one light year equals (300 000 000*3600*24*365)m. A single light year is definitely huge: 9.46 trillion kilometres-no need to put this in digit form-in fact. But where exactly do I want to converge? A star that you see in the night sky is not one but many light years away. This means that it is very far away. But most importantly, it means that light from this particular star takes many years-and not mere seconds-to reach your eyes! So what? When you watch a star, you are positively only seeing the light it emitted years ago. At present, the star may be somewhere else in the night sky. (Stars do move in space). It might have deflected a little to the east or north or north-northeast. The star is still emitting light though. This light will however be seen in the following decades or even centuries; or simply next year. When you watch stars at night, you are for a certainty looking in the past. So who or what is time travelling? The star? You? Or light? The further something is from you, the further in the past you are penetrating into. Maybe then, someday, the newest technologies will be able to observe these seconds hind the Big Bang-if it ever occurred in the first place.
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Advice Home Business Technology Online Advertising Motivational Internet Marketing SEO Help Online Games Science Articles Happiness More Articles:1. Portable Crowd and Protestor Control Systems By Lance Winslow Summary: These magnets will charge a capacitor and be hooked up to an LED lighting system using fiber optics or reflectors, each one hooked up to a .2 to .5 watt light. With hundreds of thousands of lights hooked up in a composite format it will face the rowdy crowd of hostile intent protestors.Currently this technology is being used in those little flashlights you seArticle: Each year we see protest groups which get out of hand in their protests, attempting to disrupt meetings or events. Often… 2. What does statistics have to do with drug contaminated bank notes? Summary: This analysis method helps find the composition of a physical sample by generating a mass spectrum that represents the masses of the sample's components. The short heating time helped remove sufficient material from the notes without destroying them (a crucial consideration to be kept in mind while conducting forensic work).The logic behind this method is that if the notes were to contain heroin, the mass spectrometer would detect two product ions namely, (m/z 328 and 268) from the prot… 3. Conspiring to Create Our Weather By Lance Winslow Summary: Once these facts are known and the trends studied, then you can adjust the weather as you see fit by bombarding laser beams or chemical laser beams into each other or by sending in ELF into the area or invisible boxes which have various winds aloft and clouds and barometric requirements necessary already present to be adjusted and then folks it will not matter if yoArticle: Some say the weather is totally random and does not exist in any pattern. Even some ivied halls wonder kids show … 4. The Measurement Problem in Quantum Mechanics Summary: Maybe our very ability to measure, to design measurement methods and instrumentation, to conceptualize and formalize the act of measurement and so on ' are thus limited and 'designed' as to yield only the 'collapsible' solutions of the wave function which are macrocosmically stable and 'objective' (known as the 'pointer states')?Most measurements are indirect - they tally the effects of the system on a minute segment of its environment. The overall increase of order in the Universe shou… |
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