Journal of the Amateur Astrono mers Association of New York September 2010 Volume 58 Number 9, ISSN 0146-7662 EYEPIECE around other stars and transported to our solar system. ... Astronomers found several stars with surface temperatures mor e than 71,500 degr ees, mor e than seven times hotter than the Sun. ... Astronomers have found a disk of dust around a huge, massive star in its early stages of growth, indicating that stars big and small for m by the same mechanism. ...

... 85, No. 11, pp. 972­985. i The Stellar Population and Evolution of Galaxies of the NGC 80 Group O. K. Silchenko1 and V. L. Afanasiev 1 2 Sternberg Astronomical Institute, Universitetski i pr. ... The bulges of five of the seven galaxies appear to be old, with the average age of the bulge stars being 10­15 billion years. Signs of a relatively recent star-formation burst are observed in the small S0 galaxy IC 1548, whose average bulge age is 3 billion years and average core age is 1.5 billion years. ...

... 8 February , 2014 SAI seminar (Ryde et al 2010) 5 Thermal emission from GRB jet progenitor observer photon jet Photosphere (=1) · · · · Photons are not produced at the photosphere We have to calculate radiative transfer We need to know where the photons are produced We construct the expression for effective optical depth in relativistic flow considering random walk process in relativistic flow SAI seminar 6 8 ... 8 February, 2014 SAI seminar 28 ...

... 000, 1­10 (0000) Printed 4 May 2011 A (MN L TEX style file v2.2) Dark halo mass function in a prescribed spherical host perturbation ­ Press­Schechter theory with statistical constraints E. P. Kurbatov 1 1 Institute of Astronomy, 48 Pyatnitskaya St., Moscow, 119017, Russia 4 May 2011 ABSTRACT Here proposed a modification of the Press­Schechter theory allowing for the presence of a host density perturbation ­ host halo or void. ... The models were computed for the host halo mass Mh = 1012 h-1 M . ...

... V. Sign Conventions Aberration -Free Image Spherical Wavefront , Defocus, and Lateral Shift Angular, Transverse, and Longitudinal Aberration Seidel Aberrations A. Spherical Aberration B. Coma C. Astigmatism D. Field Curvature E. Distortion Zernike Polynomials Relationship between Zernike Polynomials and Third-Order Aberrations Peak-to-Valley and RMS Wavefront Aberration Strehl Ratio Chromatic Aberrations ... Term # 3 represents focus. ... W is the mean wavefront OPD. ...

... Contacting and discussing with people sharing your interests, participating in night sky observations with telescopes as well as a large choice of astronomical books, magazines and video-tapes out of our club library. ... The seasons, the seeing ( a clear sky is not always associated to calm , stable air ) and most important how dark your observation site is. ... Therefore a dark site for observing is at least as important for deep sky observation as the diameter of your scope. ...