Redshift is an important concept in astronomy that is used to describe the distance of a far away object. As a term in physics, redshift refers to the change in the frequency of a photon from higher to lower energy and accordingly from shorter to longer wavelength. In simple terms though this just means that wavelength of the light is stretched so much that one can observe the light to shift towards the red part of the spectrum, which is [...]

In science, there will always be the term prism, especially when the field of optics is involved. A prism is an optical equipment with a transparent color, a flat, triangular shaped, and polished surface, which refracts light.

The sky is constantly illuminated by stars and other bright astronomical objects. Without the light emitted by the stars, particularly by the Sun, our world will become pitch dark and our visions will be impaired. With these celestial bodies continuously emitting electromagnetic radiation, we can see the world in a more vivid perspective. Astronomers use the light to study these astronomical bodies in depth, this is a field of study known as photometry.

Infrared in astronomy is an important branch of the science which uses infrared radiation or heat energy to detect and study stars, galaxies and other celestial bodies. A relatively new field, it has contributed a lot to current astronomical knowledge.

A neutrino is a little-understood, mysterious particle smaller than an atom. It is considered as one of the most important particles that our world is composed of. Neutrinos have only been recently discovered (or deduced to exist). They are thought of as similar to electrons, except that they don’t carry an electric charge.

Optics is the scientific study of light. It is a branch of physics that covers the behavior and properties of light. History is witness to how light has become an object of interest for humans due to its complicated nature. The study of optics dates back from the development of lenses in Ancient Egypt.

Photo by: Ligar Creative Commons In physics, focus is defined as that point in which the rays of light converge or meet; or diverge in the case when light is refracted or reflected. In optics, it can mean a number of things including: • A lens’ focal point • A lens’ or a telescope’s eyepiece’s focal length • The condition by which an object being viewed through an optical system is seen; either being in or out of focus • [...]

Stars were thought to be fixed balls of light in the sky before the advent of the modern telescope. Astronomers have now discovered that some stars can change in brightness and call them variable stars.

Interferometry is a branch of radio astronomy. Under astronomy it is defined as the family or group of techniques to use superimposed or overlaid electromagnetic waves placed in a specific order to extract information regarding light, sound, or radio waves. This type of study is vital and essential in astronomy, since the way to study celestial bodies or even the universe is through the means of electromagnetic, sound or light waves. This means that it passes through a medium, much [...]

Light pollution is also referred to as luminous pollution. It is the excessive production of man made light. It is also defined as the negative consequence of too much artificial light, which includes the clutter of light. Energy waste is also associated with such excessive production of artificial light.