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cosmic microwave background radiation (CMB)The Big Bang theory predicts that the early universe was a very hot place and that as it expands, the gas within it cools. Thus the universe should be filled with radiation that is literally the remnant heat left over from the Big Bang, called the “cosmic microwave background radiation”, or CMB.

In 1965, two young radio astronomers, Arno Penzias and Robert Wilson, almost accidentally discovered the CMB using a small, well-calibrated horn antenna. It was soon determined that the radiation was diffuse, emanated unifromly from all directions in the sky, and had a temperature of approximately 2.7 Kelvin (ie 2.7 degrees above absolute zero). Initially, they could find no satisfactory explanation for their observations, and considered the possibility that their signal may have been due to some undetermined systematic noise.However, it soon came to their attention through Robert Dicke and Jim Peebles of Princeton that this background radiation had in fact been predicted years earlier by George Gamow as a relic of the evolution of the early Universe. This background of microwaves was in fact the cooled remnant of the primeval fireball – an echo of the Big Bang.

The CMB is nothing but a heavenly hisss…Wanna listen to it? Just click the play button.

cmb.mp3

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Credits:

1. Mp3- “Berlin Cosmic Microwave Experiment” (BECOME)

2. Image – Nasa

Gravitational wave is a prediction of Einstein’s General Relativity . Gravitational waves are disturbance in curvature of space-time caused by the motions of matter and they propagate as a wave, traveling outward from a moving object or system of objects. Important examples of systems which emit gravitational waves are binary star systems, where the two stars in the binary are white dwarfs, neutron stars, or black holes.

Gravitational waves propagate through space-time at the same speed of light . It does not only propagate through space but also matter. Here is video on Gravitational wave you will like to enjoy:

I have just visited Guardian’s Particle Physics section and found that they have really made a nice flash presentation of Cern’s Large Hadron Collider( LHC ) . Yes.. that Large Hadron Collider for which physicists are waiting for a long time and after 20 years of preparation it is ready to switch. This is the main focus now in science community. Does SUSY ( SuperSymmetry ) exist? Does extra dimension exist ? and more.. questions are to be answered by LHC. Here are two snap shot of Guardian’s presentation.

Large Hadron Collider

Mini Black Holes at LHC

Watch Full Flash Presentation at Guardian

Its a hot news now that famous theoretical physicist and the writer of award winning book ” Brief History of Time” Stephen Hawking may leave Cambridge. He has received an offer from Canadian research institute ” Perimeter Institute of Theoretical Physics” where he would join recently appointed director Neil Turok. Hawking may visit perimeter next month and take decision whether he will move permanently or not.

Stephen Hawking

You can see detail at National Post,Telegraph, and Discovery Channel.