Organization in science is a must. When trying to classify, scientists call this the study of classification or taxonomy. Well, in terms of astronomy, there is also organization. And one of these classifications is called the spectral class. Spectral class or spectral classification is the manner of organization in astronomy that deals with classifying stars according to brightness or luminosity, or through the spectrum or color of the star’s chromospheres.

Most celestial bodies can be observed as entities resembling a definite shape when the proper equipment is used. The Sun, when viewed under a solar filter resembles a great big ball without the harmful rays. Most of the stars can be viewed the same way, where it can be seen as a sphere. However, numerous astronomers have detected that the intensity of the image formed by a star slowly diminishes from the center going to out towards the edge of [...]

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.

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.

A perfect time to stargaze is during a moonless sky and at a location where there is a minimum of light pollution and sky glow. When we observe stars, we observe them according to their apparent magnitude or the brightness that we see by simply observing using the naked eye. In astronomy, this particular radiant energy is quantified as luminosity, which is the amount of energy released by a star every second and is often expressed in joules per second [...]

Transparency is one thing you want to be familiar with when you observe astronomical objects with your telescope. When observing the sky with a telescope, what you will see will depend on viewing conditions, the transparency conditions and of course, the features of the equipment you are using. Viewing conditions are affected by how air cells in the atmosphere move.