<pedrocorreia.net ⁄>
 

<How Can We See Galaxies 47 Billion Light Years Away When the Universe is Only 13 Billion Years Old? ⁄ >




clicks: 3482 3482 2008-09-13 2008-09-13 goto ciencia myNews ciencia  Bookmark This Bookmark This


This is my second post in the Just Science Week Challenge.

This 2003 paper in Physical Review Letters puts a lower limit on the size of the universe at no smaller than 46.5 billion light years in radius. If the universe is geometrically flat, that is.

In this video I made on the Hubble Deep Field, I mentioned this number and was immediately inundated with questions and comments from people screaming that that number could not possibly be correct. How can the universe be that big if the fastest anything can travel is the speed of light? The universe simply CAN'T be larger than the distance light travels during age of the universe, right?



este é só um excerto do artigo, para aceder ao artigo completo, clique no link em baixo:
this is just a small excerpt from the article, to access the full article please click in the link below:

http://www.astronomybuff.com/how-can-we-see-galaxies-47-billion-light-...




Subscribe News RSS  Subscribe News Updates by E-mail





myNews <myNews show="rand" cat="ciencia" ⁄>

NASA Unveils Their New Launch System

NASA Adminstrator Charlie Bolden and several members of Congress announced today the decision on NAS (...)

clicks: 5567 5567 2011-09-21 2011-09-21 goto url (new window) universetoday.c... goto myNews ciencia


Breakthrough Study Confirms Cause of Short Gamma-Ray Bursts

A new supercomputer simulation shows the collision of two neutron stars can naturally produce the ma (...)

clicks: 5652 5652 2011-04-18 2011-04-18 goto url (new window) nasa.gov/topics... goto myNews ciencia


NASA's Kepler Mission Helps Reveal the Inner Secrets of Giant Stars for the First Time

University of Sydney astrophysicists are behind a major breakthrough in the study of the senior citi (...)

clicks: 5567 5567 2011-04-09 2011-04-09 goto url (new window) nasa.gov/missio... goto myNews ciencia


Best Images from 2010

Here are some of the best space and astronomy images from 2010. These are in no particular order or (...)

clicks: 7256 7256 2011-01-01 2011-01-01 goto url (new window) universetoday.c... goto myNews ciencia


Voyager 1 Has Outdistanced the Solar Wind

The venerable Voyager spacecraft are truly going where no one has gone before. Voyager 1 has now rea (...)

clicks: 5940 5940 2010-12-25 2010-12-25 goto url (new window) universetoday.c... goto myNews ciencia


Food expiration dates: What do they really mean?

Are you one of those people who pour the milk down the drain on the expiration date? Expiration d (...)

clicks: 5902 5902 2010-09-16 2010-09-16 goto url (new window) green.yahoo.com... goto myNews ciencia


NASA - A Galactic Spectacle

A beautiful new image of two colliding galaxies has been released by NASA's Great Observatories. The (...)

clicks: 5940 5940 2010-08-21 2010-08-21 goto url (new window) nasa.gov/missio... goto myNews ciencia


Calculate distance, bearing and more between Latitude/Longitude points

(...)

clicks: 7220 7220 2010-08-12 2010-08-12 goto url (new window) movable-type.co... goto myNews ciencia