Friday, December 31, 2010

Science for Kids: Things you didn't know about Light

What is "Light"

Light is a type of energy. It is a form of electromagnetic radiation of a wavelength which can
be detected by the human eye. In physics, the term light sometimes refers to electromagnetic
radiation of any wavelength, whether visible or not. Light exists in tiny packets called photons.
It shows properties of both waves and particles. The study of light, known as optics, is an important
research area in modern physics.

Thursday, December 9, 2010

What are the types of galaxies

Galaxies are certainly among the most popular telescope targets for amateur astronomers. They show an incredibly wide range of size, shape, and internal structure has undoubtedly lead to their fascination among both amateurs and professional astronomers alike. they are vast groups of stars, dust, and gas ranging from a few thousand to nearly a million light-years in diameter. 
Their respective masses show a similarly broad range from less than a million to well over trillion solar masses. This variety of shape and form is far greater than in any other class of deep sky objects.