Astronomy is one of the oldest sciences and deals with the study of the universe and the celestial objects. Celestial objects are the stars, galaxies, moons, planets, asteroids and comets. It also tackles with the processes of the celestial objects such as supernovae explosion, cosmic microwave background radiation and gamma ray bursts. Astronomy and astrology are commonly associated but astrology is not a science. The two kinds of astronomy are observational and theoretical. In observational astronomy, astronomers focus on the study of planets, galaxies and stars.
Theoretical astronomy, on the other hand, focuses on the analysis of the evolution of the systems. Theoretical and observational astronomy complements each other because theoretically, astronomers rely on the information collected and observations made confirm all of it. It is impossible to study and observe the system from its birth to death that is why astronomers rely on snapshots and information collected on the different stages of the system’s evolution.
Astronomy is an enormous field of science because it tackles the universe and all the celestial bodies within it. For this reason, astronomy has various subfields that enable scientists to specialize in specific subjects. Planetary astronomy focuses on the planets’ growth, evolution, and death. Solar astronomy specializes on the Sun. Stellar astronomy emphasizes the study of stars including the supernova, black holes, nebulae and white dwarfs. Galactic astronomy studies the galaxies including the Milky Way.
The earliest branch of astronomy is the astrometry. This is the study of the measurement of the planets, moon and sun. Obtaining the accurate calculation of the motions of the said bodies will help astronomers to determine the birth and development of stars and planets. It also helps in predicting phenomena such as appearances of comets, meteors and eclipses. Astronomers have begun observing and recording astral events since the dawn of evolution. The first events recorded were the rising and setting of the sun; movements of the stars in the sky and the appearance of eclipses. The early studies of the universe were only conducted through observations by the naked eye.
As developments to these studies have evolved and the concept of civilization has developed, astronomical observatories were made. In addition, the invention and improvement of the telescope were made. More discoveries about the universe and celestial bodies were discovered. Nowadays, there has been various apparatus created to continuously make discoveries about the universe. It is believed that the universe is expanding and there are still a lot of phenomenon and sightings that need to be studied and confirmed.