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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. Planet Hugging By Lana M. DelliCarpini Summary: You must care about the conditions under which the future generations will have to live, you must care about every aspect of the environment on the planet of which we live, and most importantly, you must care about fixing the problems that have already been created instead of simply making 'Band-Aid' (Nering 352) solutions for these potential disasters.… 2. Down Scrolling Text to Find Patterns By Lance Winslow Summary: Look at the text of Mienkoff or patterns in the Declaration of Independence.I believe text and the patterns you can see when you concentrate on the pattern rather than the words while down scrolling, might give you more insight than you think. If you can separate out the BS through the process of elimination, you might be able to determine reality from threatArticle: I accept a program can be written to scan text such as an email, story or budget of news in Western Languages, which mig… 3. Increasing Lightening Storm Intensity and Direction Control of Strikes By Lance Winslow Summary: Attracting the lightning at the desired interval and increase the intensity of the storm to intended best secure objective.For military it would prevent enemy communication of various bands, for car washing it would mean everyone gets a free car wash, directed energy could be collected for a power source eventually, Intensive storms could help cloud formationArticle: Using four UAVs in formation with one C-130 stalwart aeroplane or 747 with onboard laser:http://www.de.afrl.af.mil/News/… 4. What is a Coprolite and Where Can I find One? Summary: By analyzing coprolites, human and otherwise, it is sometimes possible to determine the diet of the animal which produced them and also the health of that animal. Whoever left this magnificent piece of human excrement lying in the dirt a thousand years ago surely couldn't imagine anything of its recent retrieval and subsequent study. The human coprolite is currently undergoing repairs as it was recently broken into several pieces when its display stand toppled. I haven't located any in… |
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