Cosmology

The universe's explosion into being is known as the Big Bang. In this article we look at what the Big Bang theory is, the evidence we have for the theory and what the future may hold for the universe.

Steven Hawking, the man with the computerized voice, has become part of pop culture, making his way into TV shows and songs. He has had a prestigious career as a cosmologist who was able to communicate the wonders of the universe despite a progressive and debilitating condition.

Cosmic Scale Factor is a function of time which represents the relative expansion of the universe. It relates the comoving distances for an expanding universe with the distances at a reference time arbitrarily taken to be the present.

The Cosmic Microwave Background Radiation (CMBR) or Cosmic Background Radiation (CBR) is the afterglow from the early universe and provides strong evidence for the theory of a hot Big Bang. This article looks at what the CBR is, how it was detected and why it is important for cosmology.

A black hole is a region of space that has so much mass concentrated in a small area that there is no way for a nearby object to escape its gravitational pull.

Attempts to measure the speed of light have played an important part in the development of the theory of special relativity, and, indeed, the speed of light is central to the theory.

Physically, light (including X-rays, ultraviolet, visible light, infrared, radio) is an electromagnetic wave and always appears in the form of finite quanta, photons. But what do these terms mean?

Despite the complexity of the universe, all matter is made up of a limited number of particles, and the way in which these particles interact with one another can be reduced to no more than four distinct interactions.

The accelerating expansion of the universe is the observation that the universe appears to be expanding at an increasing rate, so that the velocity at which a distant galaxy is receding from the observer is continuously increasing with time.

In this article, we will have a look at some of the important physics concepts needed to understand how the universe works.