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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. Sound From Transmission Power Lines Should Never Be Wasted By Lance Winslow Summary: The tank can also be on the ground and the enclosure has a tube down to the ground where the sound will travel and using harmonic and bouncing the sound around the outside of the container where the Helium is trapped it will enhance the sound which surrounds it.The sound waves penetrate the tank and the Helium Atoms are heated up and then they bounce into eacArticle: High Tension Power lines and transmission line towers make noise, we have all heard this. But Sound can be a source of e… 2. Big Bang or Lots of Big Fire Crackers? By Lance Winslow Summary: Yet they say that each boundary is not flat but bumpy and as each boundary touches a piece of another boundary they create events which lead to the creation of debris and matter we know as planets, suns, quasars, black holes, etc..If the universe is expanding and then it contracts back together it would not come into a super small piece of matter, since as itArticle: There are many who talk on the Big Bang Theory. when no one can be sure what went bang? Steven Hawking suggests it does … 3. Matrix and the NSTP ( Non - Spatial Thinking Process ) Theory Summary: The NSTP ( Non - Spatial Thinking Process ) theory is the most advanced, theoretically accurate, unificatory theory that is deeply related to the idea of the whole world to be a matrix. Article: The NSTP ( Non - Spatial Thinking Process ) theory is the most advanced, theoretically accurate, unificatory theory that is deeply related to the idea of the whole world to be a matrix. Through the NSTP theoretical perspective space (as a room or void out there) is a projection of non - spatial … 4. Acoustic Transducers for High Altitude Balloon Control By Lance Winslow Summary: Using acoustic transducers it maybe possible to create a small region of thicker air underneath a blimp and use that patch as a platform of air to float on while blowing ever so slightly low pressure air underneath the blimp like a hover craft. Article: Using audio transducers it maybe possible to create a small region of thicker air underneath a heavy and use that patch as a platform of air to float on while blossom ever so slightly low pressure air underneath the hippo like a hover … |
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