Using a combination of instruments on ESO's Very Large Telescope, astronomers have discovered the most massive stars to date, some weighing at birth more than 300 times the mass of the Sun, or twice as much as the currently accepted limit of 150 solar masses. The most extreme of these stars was found in the cluster R136 in the Tarantula Nebula. Named R136a1, it is found to have a current mass of 265 times that of the Sun. ...

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... In 1930, Trumpler noticed that linear diameters (LD) of open clusters increase with distance (D) from the Sun. ... Since that time, the interstellar absorption has become one of the best studied factor in astrophysics, and we may hope that current OCL distance scales are free from this LD-D correlation. To verify if this is the case we have chosen several modern OCL distance scales and test them with the same clusters and the same angular diameters that Trumpler had used back in 1930. ...

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This lesson is intended as a revision of basic direct-current (DC) circuits . It was discovered in the 19th century that certain materials (so-called ideal resistors) have a current through them I that is proportional to the potential difference (voltage) across them V. This is not a fundamental law of physics (like momentum conservation) but is an observed behavior which some materials roughly follow (like the friction law we covered earlier in the course). ... This equation is called Ohm's law. ...

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... We present several applications of the AIPS++ environment as applied to the development of the Green Bank Telescope as well as current astrophysical problems. ... In particular, the Green Bank Telescope (GBT) project requires AIPS++ as an analysis environment. To accommodate and facilitate the GBT development, several sets of tools have been fashioned within AIPS++ at several points along the data path, from general calibration routines and data quality assessment to analysis and modeling. ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Solar System . ... Moon . ... Space Flight . ... Earth Satellites . ... Concept Spacecraft . ... Monthly Sky Notes . ... This image of Earth (left) and the Moon (right) was taken by the Juno space probe's JunoCam, three weeks after its 5 August launch. (image credit:: NASA / JPL / MSSS) . ... Earth and the Moon form a тАЬdouble planetтАЭ unique in the Solar System. ... Subscribe to Astronotes . ...

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The Geodetic Reference Antenna in Space ( GRASP ): A Mission to Enhance the Terrestrial Reference Frame Yoaz Bar-Sever1, R. Steven Nerem2, and the GRASP Team 2 Jet Propulsion Laboratory University of Colorado, Boulder 1 Terrestrial Reference Frame ( TRF ) and GRASP · TRF is fundamental to all areas of geophysics TRF · TRF are currently determined by 4 space-ground geodetic techniques: - GPS/ GNSS - ... YEB, September 2012 10 ...

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. eng || rus . Home . Projects . Research . Publications . Astronomy Letters . Conferences . SRG Project . RSDC . Contacts . The main scientific projects of the department . Orbital observatory "Rentgen" . on MIR station . Granat orbital observatory . INTEGRAL gamma-ray observatory . SRG Project . Russian-Turkish 1.5-m Telecope . 2016 IKI RAN

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... start : uncertain_data . ... SAI VO Projects . ... Help on Wiki search . ... Show page Old revisions . These are the older revisons of the current document. To revert to an old revision, select it from below, click Edit this page and save it. 2011/08/26 15:09 uncertain_data karpov (current) . 2011/08/26 14:57 uncertain_data created karpov . uncertain_data.txt Last modified: 2011/08/26 15:09 by karpov Back to top . SAI VO | ... SAI MSU | ...

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