... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

... High redshift radio galaxies . ... Verkhodanov O.V., Kopylov A.I., Zhelenkova O.P., Verkhodanova N.V., Chernenkov V.N., Parijskij Yu.N., Soboleva N.S., Temirova A.V. 2000. ... Verkhodanov O.V., Kopylov A.I., Parijskij Yu.N., Soboleva N.S., Temirova A.V. "Color ages of parent galaxies of high redshift radio sources", in Proc. XV Conf. on "Aktualnye problemy vnegalakticheskoi astronomii" ("Current Problems of Extragalactic Astronomy"), Pushchino, May 25--29, 1998, printed in Pushchino Sci. ...

... They are concerned with Attitude Control System of the spacecraft, satellite visibility from tracking stations, limits on the satellite autonomous operations during the orbit, and needs for auxiliary operations with the spacecraft. ... Among the operational constraints the most important one is the number of programmed slews per orbit, which determines the maximum number of radio sources to be observed during one orbit. ... System temperature (K) . ... Progress of the RadioAstron Project in Pictures...

Text of these problems is available also in other languages : . ... What can one see in the Moon's sky more often - the Sun or the Earth? ... There are about of 250 millions of stars in the elliptical galaxy M32 (a satellite of Andromeda galaxy). ... The masses of Capella's components. ... You are proposed to estimate the masses of Capella's components, using our observational data. ... A galaxy's mass. ... Estimate the mass of FGC 1908 and compare it to the mass of our galaxy. ...

THE RELATIVE MONTHLY MEAN SUNSPOT NUMBER ON MARCH 2016 HAS MADE Wmarch = 32.9, 54.9 ( new ) THAT GIVES FOR 80 MONTHS (2015, SEPTEMBER) DEVELOPMENT CURRENT 24 CYCLE OF SOLAR ACTIVITY THE SMOOTHED MONTHLY MEAN SUNSPOT NUMBER W*sep. = 39.6; 66.0 - (in new system ); W*aug. = 39.8; 66.3 - (in new system ); - On July 1, 2015 Centre in Brussels moved to a new system of cal- culation the relative ... Almost all the work using smooth W* have to lead to a new system, if it remains. ...

... GCR and SCR are primary cosmic rays. 10-15 years after the discovery of cosmic radiation (1919) there emerged two main avenues of investigation in the physics of cosmic rays (CR): 1) nuclear - elucidation of the origin of elementary particles and nuclear interactions; and 2) astrophysical (space physics) - solution of the problem related to the origin and variations (changes in intensity) of CR. ... Besides, the CR flux in interplanetary space is, strictly speaking, not isotropic. ...

Main . ... About meteorites . ... What to do if you found a meteorite! ... About the laboratory . ... You may have a question: what to do if you found a stone which looks like meteorite. ... According to the Meteorite Nomenclature Committee, in order for a meteorite to be officially registered in the International Meteorite Catalog, 20% by weight of the main mass of the identification sample must be contributed to a qualified scientific organization. ... The Staff of the Laboratory of Meteoritics. ...

alignasn -- Change the relative shifts in association file alignasn association . ... calnicb style association file with list of images to be aligned. ... Interactive program to compute relative shifts of images in an association file. ... After computing the relative shifts of the direct images, alignasn searches for corresponding grism images for each of the direct images. ... The grism association is then updated with the same relative shift measurements as determined from the direct images. ...

O ptimal transport : T heory and A pplications . ... Home Research Publications Software Rencontres People Links . A draft bibliography on optimal transport is available on CiteULike , a free Web service for scientific bibliographies. ... A random collection of optimal transport-related home pages (for a list of OTARIE participants' home pages click here ): . ... Wilfrid Gangbo : Georgia Tech . ... Allen R. Tannenbaum : Georgia Tech . ... Optimal transport-related projects: . ...

... the data are described accurately enough to allow an unambiguous interpretation of the data, as well as a comprehension of the context in which the data were acquired and/or processed; a single ascii file, named ReadMe , is designed for this role. the data are in a format which allows their usage by tools currently in usage in our discipline -- normally flat ascii files ; other formats can be accepted, but are converted into flat files. ... How to prepare the Data files . ... How to deposit the data...

Sharing the Vision Johnson Space Center employees strive every day to deliver NASA's message of exploration to the community, the country and the world. ... NASA Brain Bites Does your brain need a snack? If so, go find a NASA Brain Bite. ... NASA's Digital Learning Network brings space back to school By JSC's Education and Student Program's Branch Rocket Science at Home Rocket Science at Home (RSAH), an offshoot of NASA Brain Bites, is designed to help kids explore rocket science. ...

. home . product . gallery . contact .