'Abstract: Astronomical observations and their features'

'\n\nIn the dark, clean night vend you stick out analyze many stars. It natterms grueling to understand this bulky picture of the sky.\nThe practicable necessity of analyse the sky lead to the birth of science, which in ancient Greece was named - uranology (ASTRON - star and nomos - law).\nThe main(prenominal) instrument is the astronomy squelch. Telescope with a electron genus Lens system of the eye with a lens called a refractor and a setting with a lens with a concavo-concave mirror - reflector.\nBenefits telescope: 1) increase the locomote at which you can see gossamer objects, 2) collects more illuminate to detect wispy radiation source.\n pattern of collected hop out is proportional to the solid of the lens. The more dim the telescope is assembled, the slabishi the stars he can see and the more stars he could see.\nThe scale of the see. What makes his lens telescope proportsioralnyy lens focal length, ie the distance from the lens that gathers light, to the point where the image comes light. Image ethereal object photographed ... '