Astronomy is a field of science that studies the nature and motions of celestial bodies. This includes studying objects such as stars, planets and entire galaxies.Know More
Those in early civilizations recognized and kept records of the regularity of celestial motions, making astronomy the oldest of the physical sciences. Early astronomers used their observations to help create the first calendars, dividing the months and years based on their observations.
Nicolaus Copernicus helped to create modern astronomy in 1543 with the publication of "On the Revolutions of the Celestial Spheres." This work claimed that the sun, and not the Earth, was the center of solar system and that the Earth rotated on its axis. Another astronomer, Galileo Galilei, used a telescope for astronomical purposes for the first time in history and made observations of four of Jupiter's moons and the phases of Venus. This evidence provided support of Copernicus' ideas. Later, Isaac Newton helped to unite the sciences of astronomy and physics with his laws of motion and theory of universal gravitation.
Techniques that made use of photography and spectroscopy revolutionized astronomy in the 19th century. This helped astronomers shift from studying the positions of stars to studying their composition. In addition, other technological advances, such as larger telescopes, have helped astronomers learn more about the universe.Learn more about Astronomy
Math is used in astronomy to calculate routes for satellites, rockets and space probes. In addition, math is used in the global positioning system, for transmitting messages when data is compressed, and for coding the images and element modeling to build spacecraft.Full Answer >
Radio telescopes are important in astronomy because optical telescopes can only observe objects that emit or reflect light. As light comprises only a narrow range of the electromagnetic spectrum, radio telescopes have played a vital role in obtaining knowledge of the universe.Full Answer >
The celestial meridian in astronomy is the half-circle that connects the zenith with the astronomical north and south poles, explains Swinburne University. It is a part of the celestial sphere.Full Answer >
Radio telescopes are useful in astronomy because radio waves can be observed any time of the day or night. Radio waves are also not distorted by the Earth's atmosphere or by gas and dust.Full Answer >