Time travel: sci-fi?Learn Science on mps-science.com. Time travel: sci-fi? article will help answer your questions on Science.We at mps-science.com specialize in Science. Science at mps-science.com provides the most up to date news and articles. If you have questions please do not hesitate to contact us.
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.
|
Advice Home Business Technology Online Advertising Motivational Internet Marketing SEO Help Online Games Science Articles Happiness More Articles:1. Predictions of Mayan Calendar Followers? 2012 is Just Around the Corner By Lance Winslow Summary: Yes, because the cycles although may not come in our lifetime, they surely will come as they have come before. Yes, we can balance out the planet by moving ice around, changing reservoirs (China is doing this now, not that they have figured it out yet), etc on the surface and in the perfect balance will come a better orbit.With that better orbit will also comArticle: Well have you heard the latest of the newest Doom and Gloomers? This on; the Mayan Calendar, which officially ends in 20… 2. Building an Ice House on Mars By Lance Winslow Summary: There is ice at the Martian Poles, one of the poles has water ice in abundance. We can build small micro hydro-electric systems to provide power as well to provide back-up.I propose that we build Ice Hotel Type habitats in the Mars Ice Cap for exploration and human colony and establish this as out exploratory base camp on Mars. Article: There is ice at the Martian Poles, one of the poles has water ice in abundance. Such an ice over region could easily be converted into a habitat for a… 3. Only knowledge from above... Summary: Let me explain, please.Before Nicolaus Copernicus (1473-1543) defied the teachings of the Roman Catholic Church by saying that the earth moves around the sun (the church believed that the earth was the center of the universe and the sun and stars revolved around it), he was risking his life.But Copernicus was not afraid to speak out about his knowledge of the heavens, and the world of modern science owes him a debt of gratitude (Copernicus was a scientist and devout Christian). So, a fr… 4. Expansion for Heat Absorption Summary: In the refrigeration cycle, the refrigerant must undergo a change in state in order for the heat to be absorbed from the environment.The refrigerant has the property of changing its state from liquid to vapor at normal room temperatures. The result - heat is removed from your skin, and it feels cool!In a closed-loop refrigeration circuit, the change of state from liquid to vapor is achieved mechanically by pressurizing the liquid at one end and forcing it through a small opening at anot… |
||||
