. F IGURE . 14. Age dependences of (a) metallicity, (b) Galactocentric distance, and (c) distance from the Galactic plane for the globular clusters of Galactic origin. Notation is the same as in Fig. 3 . The dashed lines are rms regression fits for both subsystems taken together, and the solid lines are the individual regression fits for each subsystem. The squares indicate clusters excluded from the regression solutions according to a 3 criterion. discussion in the text | privious figure .

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. June 21, 1999 . The Galactic Center in Infrared . ... Explanation: The center of our Galaxy is a busy place. In visible light , much of the Galactic Center is obscured by opaque dust . In infrared light , however, dust glows more and obscures less, allowing nearly one million stars to be recorded in the above photograph . ...

... Новости астрономии . ... Компания Virgin Galactic представит модернизированную версию своего разбившегося корабля . Компания Virgin Galactic представит 19 февраля модернизированную модель космического корабля SS2 (SpaceShipTwo), предыдущая версия которого разбилась из-за ошибки пилота в 2014 году. ... Новый корабль, по информации издания, по конструкции будет идентичен своему предшественнику. ... Первые испытательные полеты модернизированного корабля начнутся уже в этом году. ...

... A test for the determination of the nature of the generation of spiral arms in galaxies is proposed. ... Studies of the dependence of the shape of spiral arms on the nature of the mechanism for their generation (gravitational or hydrodynamic) are currently lacking; as shown in this paper, the locations of vortices relative to the spiral arms, together with the observed rotation curve, may serve as a promising test to address this question. ...

... Now we're getting ready for the Australian SKA Pathfinder ( ASKAP ) and the Square Kilometre Array ( SKA ) itself. I co-lead the Galactic ASKAP survey, GASKAP, and the Polarisation survey, POSSUM. I have roles in SKA science planning, including membership on two SKA Science working groups (HI and The Galaxy), the SKA Science and Engineering Advisory Committee, Australia New Zealand SKA Coordination Committee (ANZSCC) and ANZSCC's Science Advisory Committee. ... Read More . ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... active galactic nuclei . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...