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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. Ancient Navigation and Mapping By Robert Baird Summary: (Note by editor: this refers to the first figure in the series of diagrams published in Occ. I will cover this in greater detail shortly.} (Note by editor: these items are still under study at Harvard where there is agreement with these comments; one item depicted is apparently an early form of Torquetum, an analog computer employing a plumb bob and circular scales,Article: DR. SENTIEL ROMMEL:As part of the research team that sought to know how rushed the antediluvian navigational equi… 2. Debunking the Debunker By Robert Baird Summary: In History and Science:INSPIRATIONAL COMMENTS:'Everybody was glad that I was living; for it seemed to me that everybody ought to know about it, but I was afraid to tell, because I knew that nobody would believe me. - Danny Thomas"The world always makes the assumption that the exposure of an error is identical with the discovery of the tArticle: In History and Science:INSPIRATIONAL COMMENTS:“Everybody was glad that I was living; but as I lay there thinking as regards the wonderful plac… 3. The History of the Microscope Summary: There are a wide array of available microscopes, from the compound microscopes commonly found in high school science classrooms to powerful scanning tunneling and electron microscopes used by Nobel Prize winners. Most commercial microscopes have a light bulb, but many high-end microscopes use lasers or electrons for illumination.Microscopes have been used to make countless vital scientific discoveries. Article:The first microscope was created hundreds of years ago. In the passing centur… 4. Shamans and Their Documented Abilities By Lance Winslow Summary: Those waves we create, such as cell phone, waves, electric motor waves, electricity waves, sound waves, radio waves, microwaves, radar, infrared, etc. Then let's also throw in the waves of the body, bio-rhythms of the heart, nerve firing frequency, pulse and the various brain waves. Now then if all this is going on all around us and then we are able to plug intArticle: Many Shamans will go into a sweat house to get their premonitions, here is a make shift sweat house used by such nativ… |
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