Because our human eyes are small, we are only able to see only so much in the sky which are just the brightest stars but if our eyes were bigger, we will be able to see much more stars and galaxies as our eyes would take in more light. That's a reason for telescopes. We use to see our universe: the stars, galaxies, planet. Refracting telescopes optical system are more resistant and are rugged. Because of the tube design, the glass won't really need to be cleaned regularly. The image more steady and starper when factors such as air currents and changes in temperature are eliminated by the closed system of a tube. Other advantages of refracting telescopes can include: 1. Light paths or reflections are not disturbing the telescope. 2. There is small amount of maintenance thanks to the optical alignment that is near permanent. 3. Because the telescopes performs well in second-rate conditions, the image would be more steady. 4. The telescope's revolving power per inch of the objective aperture is great. 5. With long focal ratios can have use of simpler long focus
Because our human eyes are small, we are only able to see only so much in the sky which are just the brightest stars but if our eyes were bigger, we will be able to see much more stars and galaxies as our eyes would take in more light. That's a reason for telescopes. We use to see our universe: the stars, galaxies, planet. Refracting telescopes optical system are more resistant and are rugged. Because of the tube design, the glass won't really need to be cleaned regularly. The image more steady and starper when factors such as air currents and changes in temperature are eliminated by the closed system of a tube. Other advantages of refracting telescopes can include: 1. Light paths or reflections are not disturbing the telescope. 2. There is small amount of maintenance thanks to the optical alignment that is near permanent. 3. Because the telescopes performs well in second-rate conditions, the image would be more steady. 4. The telescope's revolving power per inch of the objective aperture is great. 5. With long focal ratios can have use of simpler long focus