... From the uvby photometry and proper motions for about 5500 nearby F stars we have found the following: (i) F stars , taken in narrow ranges of metallicity , show at [fe/H] 0 rather distinct cut-off in their distribution along the Main Sequence (MS) at the blue side, which is suggested to be an indication for the MS turn-off in stellar groups of fixed metallicity ; (ii) the corresponding turn-off age from theoretical isohrones strongly correlates with the ...

Johann Kepler - a Legislator of the Sky. The laws of the planets movements put by Johann Kepler destroyed the thousand year old dogmas about the circles and spheres and opened the way to scientific understanding of celestial occurrences. ... The best object for observation was Mars - its orbit unlike the Earth's one has a noticeable eccentricity, the rotation period in comparison with Jupiter and Saturn is not too long and observation conditions are better than for Mercury and Venus. ...

This Directory contains mean daily values of geomagnetic field components at the Tbilisi Observatory (1880 - 1991). ... Information on the DUSHETI (TBILISI, GEORGIA) magnetic observatory Geograpic Geomagnetic Latitude 42 05' 36 31' longitude 44 42' 122 12' The long history of magnetic observations of Dusheti observatory is recor- ded on the PC-Disquette. On the floppy disk in the directory DUSHETI are written the elements of the Earth's magnetic field from 1880 to 1991. ...

... MASTER Net is 56 square degrees per 1 exposition . ... 06 Dec 2015: GRB 151205B: MASTER-NET early optical observations GCN18665 . ... 18 Nov 2015: GRB 151118A: MASTER-NET optical observations GCN18613 . ... 12 Nov 2015: GRB 151112A: MASTER-NET optical limit GCN18591 . ... 07 Nov 2015: GRB 151107A: MASTER-NET optical observations GCN18565 . ... 31 Oct 2015: Five OTs detected by Global Robotic MASTER Net ATel8232 . ... 02 Oct 2015: GRB 151001B: MASTER-NET early optical observations GCN18380 . ...

News archieve . ... The YSC congratulates you with New Year! ... The representatives of the YSC made a presentation there and video presentation as a workshop report as well. ... We suggest you taking part in our annual summer students workshop "Space development: theory and practice." ... 26 July, 2006, Wednesday . ... The 9th International Students Workshop "Space development: theory and practice" was carryed out by Youth Space Center (BMSTU) with the support of the Russian Federal Space Agency. ...

... Space flight . ... Space camp . ... And now it's a high time for everyone not only to take use of the satellite communication, but also to fly into the real space without being a professional cosmonaut. ... My flight into space is not a walk, it is fulfillment of my life-long dream", - said Dennis Tito prior to take-off. ... ATLAS aerospace company is privileged to offer you a real flight into space - the most unbelievable and challenging adventure. ... Services / Space flight: General description ....

... LINKS . ... SPECIAL TOPIC . CONTACT . ... ARTICLE: Venus Transit 2004 . ... AAL's Transit Observation Results . ... Divx video from the AAL observation site. ... a) Visual observation : Only with special eclipse shades ( do not use those ones you still have from the 1999's solar eclipse because it does no more protect you properly ) . ... 1. contact ( transit begins ) : 07:19 53 s with a solar altitude of 15.5 degrees . ... Venus Transit Links: . ... Venus Transit 2004: A Tremendous Success . ...

... Facts of the Tunguska paradox . Hypotheses about the nature of the Tunguska explosion . Bibliography . ... Puzzles of the Tunguska event . Tunguska sketches . ... Review of studies of the Tunguska phenomenon . ... Vasilyev . ... Map and photos of the Tunguska site . Detailed maps of the epicenter of explosion . ... Photos . ... The expedition "Tunguska 2004" . ... The expedition "Tunguska 2001" . The expedition "Tunguska 2000" . ... The expedition "Tunguska 2002" . ...