The Calendar of Bloody A.tecs. Living in Central Mexico from the XII century to the being of the XVI century warlike A.tecs devoted much time to sciences including astronomy. For needs of agriculture A.tecs, using the knowledge received from the forecomers, developed the exact calendar system. 52 years of the moon-and-the sun cycle formed the basis of it (something like our conception of "a century"). ... A.tecs year was divided into 18 months with 20 days each. ... Mesopotamian astronomy. ...

Prague, August 16, 2006 . The main GCVS problem is that it is no longer a GENERAL catalogue of variable stars (in fact, it even never was). The GCVS always was a catalogue of galactic variables, with a minor number of extragalactic stars that were included mainly by misunderstandings. ... Recently, many thousands of new variable stars were discovered in automatic survey projects (for example, some 30000 non-GCVS stars solely in the ASAS-3 project). ...

S S P i s n ow p ro u dl y sponsored by SSP2015 REGISTRATION FOR M August 7 ­16th. ... SSP 2015 is located at Peppermint Park Camping Resort, Plainfield, Massachusetts to provide you with top-notch facilities, camping grounds and on-site food service, as well as fantastic amenities such as FREE WI-FI, beautiful in-ground swimming pool, new kid's playground, and lodge with fireplace, all under the pristine dark skies of the Berkshire Mtns! ... 45) > The Famous SSP Chicken StarBQ, Sunday August 9th. ...

... HOME . ... ABOUT LOMO . ... MICROSCOPES . ... Home Products Microscopes SF-Series SF-50TA . ... The SF-50TA trinocular stereo microscope includes the same features and accessories as the SF-50BA , but also includes the SF-FA photomicrography attachment . ... LOMO's . ... LOMO America, Inc. will repair or replace the defective microscope covered by this warranty free of charge if it is returned, postage prepaid, to LOMO America's Service Center in Prospect Heights, Illinois in its original package. ...

Kiselev A.A., Kiyaeva O.V., Izmailov I.S., Romanenko L.G., Shakht N.A., Kalinichenko O.A., Vasilkova O.O., Vasileva T.A., Poliakow E.V. (Pulkovo Observatory, Russia): Title: Results of reduction of photographic plates taken with 26-inch refractor in Pulkovo observatory Abstract: We present the results of narrow-field reduction for about 8000 photographic glass plates taken with the Pulkovo 26-inch refractor in the period from 1958 to 2007 years. ...

... Chilingarian, I., Melchior, A.-L., Zolotukhin, I. 2010: Analytical approximations of K -corrections in optical and near-infrared bands , MNRAS, v. 405, p. 1409 (also arXiv:1002.2360) . ... Calculator . ... calculate spectral energy distributions , K-corrections calculator , UKIDSS YJHK , K-corrections of galaxies , spectral based k-corrections , SDSS filter set K-corrections , K correction code IDL , kcorrect IDL C , . ...

. The optical instrument making is a work area of Laboratory for atmosphere optics of MAO NAN of Ukraine. The developments of lab staff is simple optical devices for scientific, industrial application and unique developments of astronomical devices, including space experiments. You can see our developments in section design of optical systems and production of aspherical optics. Staff . Design of optical systems . Production of aspherical optics . Contact . to main of Laboratory .

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