Beginning from the May of the 1997 we started to publish our daily solar radio observations at RATAN-600 radiotelescope. ... Periscope System: South Sector+Flat Mirror . ... It is possible to track a source by moving the secondary mirror along the arc-shaped railway tracks or to perform azimuthal 2D map synthesis . ... 1) It is possible to simultaneously carry out independent observing programs using individual sectors at various discrete azimuths and secondary mirrors on corresponding railway tracks. ...

Next: Observations and data reduction Up: On the metallicities of Previous: On the metallicities of . Since the discovery of low metallicity gas in H II regions of Blue Compact Galaxies (BCGs) by Searle & Sargent (1972), a debate lasting for decades on possible existence of local truly young galaxies is still continuing. ... In particular, we reobserved two BCGs presented in the K? list - UM 133 and UM 382. ... UM 133 . UM 382 . ... 3868 [Ne III] .. ... 1.000 0.017 . ... 0.017 0.001 . ...

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... Peter McCullough . ... Thursday, Apr 8, 2010 at 8:00 PM . NASA/ESA/P. McCullough . ... From telescopes in backyards to ones in space, observations of our "XO Project" and many others around the globe are contributing to this burgeoning field of inquiry (e.g. Garcia-Melendo McCullough (2009) and others' discovery of the transit of the 111-day-period HD 80606b). ... May this presentation inspire you to join us in a future discovery. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... The Science Operation Department is composed of Astronomers, Telescope Instruments Operators(TIOs) and Data Handling Administrators(DHAs). ... Astronomers have proposed several methods to quantitatively measure the amount of turbulence above the telescope, which the most common ones is Differential Image Motion Monitor (DIMM). In optical testing, the Hartmann test is the common method to test the quality of optical components. ... Hartmann mask consists of 48 lenses. ...

Estimations of the change of the Sun s mass and the gravitation constant based on high-accuracy observations of planets and spacecraft . ... More than 635 000 positional observations of planets and spacecraft of different types have been used for estimating possible changes of the gravitation constant, the solar mass, and semi-major axes of planets. ... gravitation constant, positional observation, Sun's mass. ...

... What's New? Bad Astronomy . ... News . ... Bulletin Board . ... Bitesize Astronomy . ... Bad Astro Store . ... On board are seven astronauts that will perform the second Hubble Space Telescope (HST) servicing mission. ... Also on board Discovery is a new data recorder, which will allow much more data to be taken at the same time on HST, as well as a new Fine Guidance Sensor, which helps the telescope track on its targets. ... 2008 Phil Plait. ... Talk about Bad Astronomy on the BA Bulletin Board! ...

... He made observations of a supernova (literally: nova= "new star") in 1572 (we now know that a supernova is an exploding star, not a new star). ... Brahe's meticulous observations showed that the supernova did not change positions with respect to the other stars (no parallax). ... This was early evidence against the immutable nature of the heavens, although Brahe did not interpret the absence of parallax for stars correctly, as we discuss below. Brahe made careful observations of a comet in 1577. ...

... Р?С?С?С?Р?Р?Р?Р?РеС?Р?С?Р?РеР? ... Launched on February 17, 1996, the Near Earth Asteroid Rendezvous (NEAR) mission is to be the first of NASA's Discovery missions, a series of small-scale spacecraft designed to proceed from development to flight in under three years for a cost of less than $150 million. ... The ultimate goal of the mission is to rendezvous with and achieve orbit around the near Earth asteroid 433 Eros in February, 1999, and study the asteroid for approximately one year. ...