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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. Science Fiction by Arthur C Clarke By Lance Winslow Summary: It is difficult to have a discussion with someone about science fiction if they are not familiar with the works of Arthur C Clarke. It is interesting to see how the science fiction of yesterday becomes the reality of today and how the same science fiction today is becoming closer and closer to tomorrows reality. Article: It is difficult to have a discussion with someone apropos science fiction if they are not familiar with the works of Arthur C Clarke. The concepts are not too someth… 2. N400 Brain Wave to Assist in Learning and in Performance By Lance Winslow Summary: Here is a thought on learning, safety, brain waves and winning.When you listen to comedy or lyrics of a song or conversation, which is Ironic."Oh Suzanne Don't you cry for me...It RAINED all DAY the NIGHT I left, the weather it was DRY!!!"When you hear something that is out of place or seems incorrect it gets your brain humming using a certain bArticle: In any important task you need to stay vivacious and in some professions someone could lose their life ifyou are not staying heads up … 3. Hominid Inter-breeding By Robert Baird Summary: 'Kenyanthropus platyops': - Perhaps the 6,000,000 year old men found by a maverick who went behind the authorities back at the Olduvai Gorge will be proven to actually not be outside the australopithecine lineage. I love how these synchronicities occur and how much there is for us to know about ourselves."The 'Gang' Hits AgainThose fameArticle: 'Kenyanthropus platyops': - Perhaps the 6,000,000 year old men found by a maverick who went rump the directorate back at the Olduvai Gorge wil… 4. Hawaii Volcanoes Summary: Once the cable was installed and tested, scientists linked up the communication system to carry data first to the Hawaiian Volcano Observatory and then to Oahu where it is available for researchers.Entire article and related Internet respources:http://scienceforfamilies.allinfo-about.com/features/hawaiivolcanoes.html Article:The Island of Hawaii is made up of five volcanoes. Each began to grow subordinate the sea and eventually joined to form a single island. The volcanoes grew from a h… |
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