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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. Aliens By Vernon Stent Summary: An example of the problem of recording the existence of these aliens is this: what if the aliens did not have the dimension of space in their tool kit? No, even these phenomena would take up some space, and my aliens have no space in which to accommodate anything. The word 'around' suggests space and as I said earlier, a thought in our universe takes up soArticle: I am breast sworn and affirmed time out to raise a subject that is dear to my heart (I normally market web sites!).Is there… 2. Older C-130 Hercules Aircraft Problematic By Lance Winslow Summary: Here is the C-130 NTSB report:http://www.ntsb.gov/ntsb/brief.asp?ev_id=2...621X00954&key=1Here is the information about the C-130 that went down.http://www.ruudleeuw.com/tanker130.htmIt happened once before in 1994http://www.ntsb.gov/ntsb/brief2.asp?ev_id=...X94FA323&akey=1and the NTSB knows there can be a problem this aircrArticle: We have seriously seen surrounding the world many Lockheed C-130 Aircraft, which have had problems over the last five years. Many of these water craft have… 3. Reverse Osmosis and Deionized Water Filtration By Lance Winslow Summary: Let's face it if you are in a business needing de-ionized water or reverse osmosis water you are always concerned about the quality of your water. water pressure forces water through a fine membrane that filters out between 85-95% of the dissolved solids in the water. Water lacking these solids won't water spot a car. It's important to have softArticle: Let’s face it if you are in a performance needing de-ionized water or reverse osmosis water you are everlastingly concerned as resp… 4. The Big Bang Theory - Evidence Start of Cosmos and Human Evolution Summary:The Big Bang Theory - Evidence Start of Cosmos and Human EvolutionWhat is The Big Bang Theory! It is not merely a Concept or a Theory (The Big Bang Theory) which can be easily understood by the use of the senses alone (as the senses have their own limitations in the physical manifested world).The Big Bang Theory has its origination in a domain which is much beyond the comprehension of the senses and the mind. And it explodes with a Big Bang giving birth to The Big Bang Theory!This Big Ba… |
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