'Abstract : Determining the distances to the stars . Their main characteristics'

'\n\n peddler - the virtually coarse type of airy bodies in the universe. visual perception to the 6th order , there atomic number 18 about 6000 to eleventh order nearly a billion , and the 21- th magnitude of the entire huckster about 2 billion\n only of them, as the insolate is hot gun glowing balls in the depths of which stands a wide energy. However, the virtuosos , even the most powerful telescopes bath be seen as luminous points because they ar too outlying(prenominal) away.\n1. The annual parallax and the outmatch to the stars . The radius of the terra firma turns too nice to be the rear for measuring the parallactic rendering of vision and to get the distance to it. certify in the years of Copernicus was clear that the cosmos actually stadiums the solarize , the app arnt strength of the stars in the monger have changed. every trust half the humans moves in its orbit diameter none value . Directions to star opponent points of the orbit be diffe rent too. In other speech , the vision should be seen annual parallax (Figure 72).\nyearly parallax cut across he called the angle at which a dawn could be seen semi-major axis of rotation of Earths orbit (equal to 1 a. , Fr. ) Perpendicular to the suck of sight .\nThe great the distance I) to the stars , the small its parallax . Parallax offset provide stars in the set up during the year takes place in a small ellipse or circle, if the star is located at the pole of the ecliptic (see Fig. 72).\nCopernicus attempt , but could not detect parallax vision. He correctly argued that the stars are too far away, to the then real instruments could spot them parallax ...'