Science

                      Today, January 22, 2016 our ICT teacher assigned us to blog or share our thoughts all about Science. Actually, I am a bit nervous at first because this is my first time to share my thoughts publicly in a social networking website, however, I am happy because Science is one of my favorite subject.

                     Well, we all know what Science is because we have encountered this since we went to school in our early years and in fact we have experience this most of the time. What I know about Science is that this explains everything that we have encountered in our everyday life. The questions  "Why the world was made?" and "Why are there stars?" are questions that can be answered by science.

                  
                                      There are many branches of science and I don't want to further elaborate these branches because we know that there are too many of them, but I chose Astronomy to further discuss with because I like exploring the the universe and it's celestial objects.
                                   
                                       Astronomy is the study of celestial objects such as the stars, galaxies, planets,moons, asteroids, comets and nebulae. It is also known as one of the oldest sciences. It comes from the Greek words "astron" means "stars" and "nomos" means "law" or "culture", ( law of the stars).
                    

            

                                                   
                                   
                                        In early times, astronomy only comprised the observation and predictions of the motions of objects visible to the naked eye. In some locations, early cultures assembled massive artifacts that possibly had some astronomical purpose. In addition to their ceremonial uses, these observatories could be employed to determine the seasons, an important factor in knowing when to plant crops, as well as in understanding the length of the year.

                                                          

                                      

                                           

                                            During the Renaissance, Nicolaus Copernicus proposed a heliocentric model of the solar system. His work was defended, expanded upon, and corrected by Galileo Galilei and Johannes Kepler. Galileo used telescopes to enhance his observations. Kepler was the first to devise a system that described correctly the details of the motion of the planets with the Sun at the center. However, Kepler did not succeed in formulating a theory behind the laws he wrote down. It was left to Newton's invention of celestial dynamics and his law of gravitation to finally explain the motions of the planets. Newton also developed the reflecting telescope.
                                        
                                                                                    Galileo Galilei
         
                                       
                                                                                 Nicolaus Copernicus

                                           
                                                                                    Johannes Kepler
                                                            
                                                                              Galileo's telescope
                                    
                                Currently now, there are many amateurs who constantly study the skies using their advance technologies or telescopes as their passing time or hobby. Their are also discoveries by astronomers like the NASA's Kepler which is the first near-Earth-size planet.