Skip to page content |

Tiscali Quicklinks. Please visit our Accessibility Page for a list of the Access Keys you can use to find your way around the site, skip directly to the main navigation, to the page content, or to more links within reference.

Advertisement starts



Advertisement ends

Content Starts Here


cosmic background radiation

encyclopaedia header
Encyclopaedia Search
Click a letter for the index
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Or search the encyclopaedia:
 
 
 
all results tagged with the © symbol denotes content that is relevant to the national curriculum

Cosmic Background Radiation


Electromagnetic radiation left over from the original formation of the universe in the Big Bang between 10 and 20 billion years ago. It corresponds to an overall background temperature of 2.73 K (-270.4°C/-454.8°F), or approximately 3°C above absolute zero.

Cosmic background radiation was first detected in 1965 by US physicists Arno Penzias and Robert Wilson, who in 1978 shared the Nobel Prize for Physics for their discovery. In 1992 the US Cosmic Background Explorer satellite detected slight ‘ripples’ in the strength of cosmic background radiation that are believed to mark the first stage in the formation of galaxies. On 30 June 2001, NASA launched the Wilkinson Microwave Anisotropy Probe, which has measured and mapped the temperature of the cosmic background radiation over the entire sky.

© Research Machines plc 2008. All rights reserved. Helicon Publishing is a division of Research Machines plc.


 
 

Advertisement starts



Advertisement ends


Ukraine Flag
Ukraine Flag The national colours are taken from the Rusyn arms of 1848. Effective date: 28 January 1992. >>

Advertorial

AdvertorialFind out how to buy the things you've always wanted and sell the things you don't on ebay.

Advertisement starts



Advertisement ends

Page Footer


Access keys


You will need to use different key combinations in order to use access keys depending on your internet browser, find out which on our accessibility page.
  • (0) Navigate to Accessibility page.
  • (1) Navigate to Home page.
  • (2) Navigate to My email.
  • (3) Navigate to My Account.
  • (4) Navigate to Site Map page.
  • (5) Navigate to Contact us page.
  • (6) Navigate to Members channel.
  • (7) Navigate to Services channel.
  • (8) Navigate to News & Info channel.
  • (9) Navigate to Entertainment channel.
  • ([) Skip down to the Primary navigation block.
  • (]) Skip down to the more links within this section block.
  • (=) Bypass all navigation and jump to the content.