Search
Related Links

 

 

Informative Articles

Genetic Genealogy Research
One of the first genetic genealogy studies was conducted in the late 1980s by scientists with the Department of Biochemistry at the University of California, Berkeley. These scientists Rebecca L. Cann, Mark Stoneking and Allan C. Wilson studied a...
Panentheism etc.
NATURE WORSHIP: - Wicca and witchcraft or other shamanic attunements akin to the kind of ethic and awe the great and beautiful (FREE) North American Indians had before the arrival of the 'civilized' men from the Old World. "A Guide to Nature...
Relationship Constellation
Relationship Constellations Finding the hidden dynamics in relationship systems within organisations Dr.Eddy Kloprogge Introduction The word organisation comes from "organic", a system that organises (organism),...
The Charm of Making
CHARM OF MAKING: - This is said to be the most powerful of all charms and abilities in the occult realms by those who have named it, at least. The truth is that much like many practitioners who devise esoteric concepts the designers and...
Walls can cool themselves!
I always start my column with a question. So why break away with tradition now? Would you believe that walls can cool themselves when they get hot? (Actually that’s 2 questions at the beginning of this column!) Many of you, if not all of you will...
 
Time travel: sci-fi?

When you look at the clear 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 alone 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 actually 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 actually 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 after the Big Bang-if it ever occurred in the first place.

About the Author

Khalil A.Cassimally is the editor in chief of Astronomy Journal and Astronomy Journal Ezine. He is also the co-founder of the RCPL Astronomy Club.
He is currently Senior Columnist at BackWash.com and Columnist for bbc.co.uk h2g2 The Post where he writes 'Not Scientific Science' column.

 

Science/AAAS | Scientific research, news and career information
International weekly science journal, published by the American Association for the Advancement of Science (AAAS).
www.sciencemag.org
 
Science/AAAS | Table of Contents: 1 December 2006; 314 (5804)
This Week in Science: Editor summaries of this week's papers. Science 1 December 2006: 1349. ... 2006 American Association for the Advancement of Science. ...
www.sciencemag.org
 
Science.gov : FirstGov for Science - Government Science Portal
Science.gov is a gateway to government science information provided by US Government science agencies, including research and development results.
www.science.gov
 
ScienceDaily: Your source for the latest research news and science ...
ScienceDaily -- the Internet's premier online science magazine and science news web site -- brings you the latest discoveries in science, health & medicine, ...
www.sciencedaily.com
 
Science News - New York Times
Find breaking news, science news & multimedia on biology, space, the environment, health, NASA, weather, drugs, heart disease, cancer, AIDS, mental health ...
www.nytimes.com
 
Science News Online
Weekly magazine offers featured articles from the current issue along with special online-only features. Includes photo collection, archives, ...
www.sciencenews.org
 
Science in the Yahoo! Directory
Explore the fields of astronomy, biology, geology, mathematics, and physics and all of their related disciplines with resources designed for professionals, ...
dir.yahoo.com
 
Open Directory - Science
Agriculture (2454); Anomalies and Alternative Science (525); Astronomy (4208); Biology (20593); Chemistry (4852); Computer Science@ (2358) ...
dmoz.org
 
BBC - Science & Nature
The best of BBC Science and Nature, from TV and radio, to the web and beyond. Take a tour from the smallest atoms, to the largest whales and the most ...
www.bbc.co.uk
 
Science - Wikipedia, the free encyclopedia
Sciences versus Science: the plural of the term is often used but is difficult to ... Science education is also a very vibrant field of study and research. ...
en.wikipedia.org
 
Popular Science
Monthly magazine about current science and technology.
www.popsci.com
 
Science/AAAS | ScienceNOW: The Latest News Headlines from the ...
AAAS web magazine. Some free sample stories, subscription required for full text.
sciencenow.sciencemag.org
 
ScienceCareers.org | Science Jobs, Funding, Meetings, and Advice ...
Searchable database of jobs, sorted by field specialty. Can post resume and curriculum vitae. Includes tips for improving the workplace for employers and ...
sciencecareers.sciencemag.org
 
American Association for the Advancement of Science
Research news, issue papers. Educational programs, science policy (US and international).
www.aaas.org
 
NASA - Science@NASA
News and features about NASA research, aimed at the general public. Includes sections on astronomy, space science, beyond rocketry, living in space, ...
science.nasa.gov
 
Science NetLinks: Resources for Teaching Science
Resources for K-12 science educators.
www.sciencenetlinks.com
 
Cool Science for Curious Kids
Fun and interactive site to help kids appreciate science. Why are snakes like lizards, and monkeys like moose? Find out here.
www.hhmi.org
 
Welcome to the Science Museum
London museum and library of science. Exhibitions cover all areas of science and technology. Includes online exhibits and a learning area.
www.sciencemuseum.org.uk
 
New Scientist - International News, Ideas, Innovation
Weekly science and technology news magazine, considered by some to be the world's best, with diverse subject matter. Articles from current issue and ...
www.newscientist.com
 
CNN.com - Science and Space
Offers news stories related environmental issues, archeology, astronomy, technology, geology and other science topics.
www.cnn.com