QUICK LINKS: About TAC Announcements Mailing List Activity Targets & Events Calendars Observing Sites Observing Reports Help for Beginners THE ASTRONOMY CONNECTION COMMANDS: Log In Register Subscribe ...
http://observers.org/
... Large Binocular Telescope Captures First Images of Night Sky View all news items Department of Astronomy/Steward Observatory 933 N Cherry Ave., Rm. N204 Tucson AZ 85721-0065 Phone: (520) 621-2288 Fax ...
http://www.as.arizona.edu/
Learn about the Moon with this eBook and predict Moon phases and more with the associated astronomy/astrology software package.
http://thx1142.nsocat.hop.clickbank.net" target="_top
Arts & Sciences Contact info Department Directory Prospective Students Alumni Research Academics ...
http://boson.physics.sc.edu/
... 78 Ni. [ Matter | 78 Ni | Past features ] MSU's Department of Physics and Astronomy is one of the top-ranked departments in the country. In addition to our Physics degree programs, we offer a separate ...
http://www.pa.msu.edu/
Top Stories News Archive Sky at a Glance Observing Highlights Sky Chart Almanac Celestial Objects Pro-Am Collaboration Image Gallery Astronomy Basics Visual Observing Telescopes & Binoculars ...
http://skyandtelescope.com/howto/basics/
Astronomy Formulas -- Page One ©1998 James Q. Jacobs PERIODICITY FORMULAS -- DEFINITIONS ... ... GO TO ASTRONOMY FORMULAS, PAGE TWO Top of Page FOR MORE ASTRONOMIC AND GEODETIC DATA CHECK OUT THE ...
http://www.jqjacobs.net/astro/astrofor.html
Astronomy Program Department of Physics & Astronomy Public Events News Astronomical Image Galleries Course Resources: AY101 - Byrd AY101 - Keel AY101 - White AY102 Labs AY203 Graduate Program People ...
http://crux.astr.ua.edu/
... Bad Astronomy Misconceptions Movies News TV BA Blog Bulletin Board Media Radio In Print Bitesize Astronomy Book Store Bad Astro Store Mad Science Fun Stuff Site Info Search the site Who am I? Contact ...
http://www.badastronomy.com/
Welcome to INSTITUTE OF ASTRONOMY ETH ZURICH with its two branches City Center Branch Hnggerberg Campus Branch ETH Zentrum ETH Hnggerberg CH-8092 Z¸rich CH-8093 Z¸rich with emphasis on solar and ...
http://www.astro.phys.ethz.ch/
... de/ deutsch This is the home page of the section Astronomy of the Institute for Astronomy and Astrophysics (IAAT) of the Eberhard-Karls-University of T¸bingen. The IAAT is part of the Faculty for ...
http://astro.uni-tuebingen.de/
The Ohio State University College of Mathematical & Physical Sciences General Information Research Pages Calendar of Events Personnel LBT Project Astro Coffee Astronomy Courses MODS Project Public ...
http://www.astronomy.ohio-state.edu/
The Astronomy Cafe "The web site for the astronomically disadvantaged" Do you have lots of ... ... Would you like to learn about a career in astronomy, Big Bang cosmology, and many other HOT topics ...
http://www.astronomycafe.net/
http://www.phys.hawaii.edu/
Greek Astronomy The Revival of an Ancient Science One of the most powerful creations of Greek science was the mathematical astronomy created by Hipparchus in the second century B.C. and given final ...
http://www.ibiblio.org/ex ...tics/Greek_astro.html
EUROPEAN ASSOCIATION FOR ASTRONOMY EDUCATION auf Deutsch en franÁais c/o European Southern Observatory, Karl Schwarzschild Strae 2, DE-85748 Garching bei M¸nchen, Germany The purpose of EAAE is to ...
http://www.algonet.se/~sirius/eaae.htm
... To continue your exploration of the Astronomy Program at Pomona College please choose a link from ... ... The Astronomy Program of Pomona College is offered as part of the Physics and Astronomy Department ...
http://www.astronomy.pomona.edu/
Official UVic Website Legal notices Last update: Feb 20, 2005
http://info.phys.uvic.ca/
Astronomy 162 Stars, Galaxies, and Cosmology In our first semester of astronomy we were concerned primarily with our own Solar System. In this semester we broaden our perspective and consider the ...
http://csep10.phys.utk.edu/astr162/lect/index.html
... Local Pages for Cambridge Astronomers only External Links Cavendish Astrophysics DAMTP European Astronomy Latest News Astronomy Conferences for Schools Postdoctoral Appointments in Observational and ...
http://www.ast.cam.ac.uk/
Main Page About Us For Teachers Astronomy Links Ask A Question! SEARCH: QUESTION AND ANSWER ARCHIVE: Most Recent Most Popular Random Question OUR SOLAR SYSTEM The Earth The Moon The Sun Planets ...
http://curious.astro.cornell.edu/
Department of Physics and Astronomy, The University of Georgia, Athens, GA 30602-2451 Phone: 706-542-2485 Fax: 706-542-2492 E-mail: physast@hal.physast.uga.edu © 2000 by the University of Georgia ...
http://www.physast.uga.edu/
RSS feeds New at Adler | SkyEye | Volunteer | Group Sales | Private Events | Press Room | Employment | Contact Us | FAQ Copyright © 2001-2005 Adler Planetarium & Astronomy Museum. All Rights Reserved ...
http://www.adlerplanetarium.org/
U n i v e r s i t y o f B r i t i s h C o l u m b i a DEPARTMENT of PHYSICS & ASTRONOMY Home Events People Research Graduate Undergrad Courses Internal Links Contacts Events Calendar People Research ...
http://www.physics.ubc.ca/
Getting Started CG-5 Improvements SAA 100 Deep Sky List Constellation Portraits Barn Door Tracker Comet Hale-Bopp Homemade Eyepieces EQ Mount Tutorial Millennium Rant Who Is Astronomy Boy? Home ...
http://www.astronomyboy.com/
... nl / projects / maya astronomy The Maya Astronomy Page Geographical orientation Maya mathematics The Maya calendar Maya writing Maya astronomy Pictures (new!) Maya related links Credits to this page ...
http://www.michielb.nl/maya/astro.html
University of Washington ASTRONOMY DEPARTMENT Welcome to our Home Page! General information Meet the People Directory/Contact Academics/Classes Graduate Studies Undergrad Program Faculty Research ...
http://www.astro.washington.edu/
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 'N
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.
http://www.aaarticles.com/article.php?id=18142