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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. Longevity - Can Fat Cells Dictate How Long a Human Survives? Summary: As we age, however, our cell information becomes illegible - similar to '...a document that is photocopied too many times...' [1] Once this happens, our cells are depleted of telomeres before our chromosomes are completely corrupted. Based on this research, our maximum human lifespan - theoretically - could typically range from 120 to 180 years of age IF we can instruct our genes how to tell our body to lose fat as opposed to storing it. In closing, I leave you with my own thoughts on t… 2. Time travel: sci-fi? Summary: 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 i… 3. Medical Miracle or Mistake? By C. Bailey-Lloyd Summary: Fundamental elements of life and the aspects of cloning bring dramatic advancement to the scientific and medical community; however, is this fast-paced artificial reproduction an intrusion of Nature or a doorway to infinite, medical cures?In lieu of scientific developments in the biological mainstream, the human intervention of life and it's natural stateArticle: Fundamental elements of life and the aspects of cloning bring forth dramatic blossoming to the scientific and medical commu… 4. Recognix: Face Recognition Technologies - bringing home the future. Summary: 'Protected Application Launch- specific applications can only be activated using face authentication.** 'Files and Folder Encryption- secures sensitive data using encryption key, based on face authentication for access.** 'Password Bank- stores user names and passwords for secure logon to Windows and web applications.** 'Screen saver lock secured by face authentication.www.face-code.com Article:You have seen it in the movies but now it is real, face recognition nocturnal epilepsy … |
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