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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. Home fly Summary: The prophet Mohammed PBUH said It the home fly falls in your drink then dip the whole fly into the drink pull it out because on one of its wings there may be a disease but there is its medicine on the other wing (Refer Bukar, Ibn Maja Ahmed.He also said Verily on one of the wings of home fly there is poison and on the other wing there is its cure If home fly falls on food then dip the fly in it because it brings for word the poison and delays the cure Refer to Ahamed IBN Maja There is m… 2. Human Evolution Timeline: Revelations in Bible Quotes Summary: Adam's rib symbolizes the chromosome and is the key to the man ape evolution. Then the rib which the Lord God had taken from man He made into a woman, and He brought her to the man.'The number of ribs - Men have 24 ribs - 12 on each thoracic side. The other cells in a chimp, as in a human, are diployd, that is, they have the chromosomes in pairs - therefore, they have 48 chromosomes.Confluence of Book of Genesis and Human Evolution TimelineWere we to admit that the rib symbolizes the ch… 3. Modification of Earth and Humans By Lance Winslow Summary: If we fail to modify our planet to serve at our needs, well then we must modify ourselves, through genetic manipulation, mitochondrion DNA and breeding to bring out the factors needed to sustain human life in the population concentrations of the future, which will go on.Mankind seems to be unable to control the need to procreate and therefore such an option wArticle: As we see in the movies and genres of consumptive events prevalent depicted in images on the silver screen we can unders… 4. Can New Born Chickens Influence a Robot? Summary: Taking the EEG from both participants and comparing them on a time scale showed that when the person in the separated room showed a stimuli in the EEG the other person's EEG showed the same stimuli, at the same time! The outcome of this experiment was so exciting that they immediately came up with some other ideas. What happened is that the robot turned significant more times towards the cage than away from it. The expected 50% left and right movement were no more random! In another exp… |
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