Since the light from galaxies represents the integrated contribution of its consitutient stars, then we can learn about stellar populations in galaxies by modelling their light by summing up individual stellar spectra for different kinds of stars. ... The data cover the wavelength range 3500 - 9000 angstroms. ... Retrieve Digital Stellar Spectra Click on the appropriate spectral type. ... Note that the designation V means main sequence, IV means subgiants, III means giants, I means supergiant. ...

... Under certain conditions, like those in the nucleus of a QSO, all atoms can be made to emit light at particular wavelengths. ... If that source is approaching the observer, the wave is squashed up onto itself making the wavelength shorter. ... This is redshift. ... You can see how the section of the QSO spectrum which we observe changes with redshift. ... We then see how far we had to slide the observed spectrum along the scale to make it match and that is the objects redshift. ... The 2QZ team . ...

... These hints are for my own system--Netscape 3.01 on a Macintosh. ... You can make the text more legible by using a larger font: --On the menu bar, go to Options menu. ... To Disable Images --On the menu bar, go to Options menu. ... Disabling the images speeds up loading from the web--although in "Stargazers" images load quickly, most of them are small and have reduced palettes. ... You may send me questions at the e-mail address on the bottom of the page, and I will answer as many as time allows . ...

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Analysis of polar motion variations from 170-yearobservation series . ... Pulkovo Observatory, St. Petersburg, Russia Abstract: . This work is devoted to investigation of low frequency variations in Polar motion (PM). It has been shown that the main PM features can be effectively investigated using not only time series of the Pole coordinates, but also using series of latitude variations obtained from observations at one observatory. ... polar motion, harmonic, Chandler wobble. ...

MOSCOW CENTER FOR CONTINUOUS MATHEMATICAL EDUCATION . ... A MATHEMATICS PROGRAM IN ENGLISH . FOR UNDERGRADUATES AND GRADUATE STUDENTS . List of Alumni | ... Impressions | Alumni reports | ... About HSE Math Department . ... Current semester info: . ... 2002 spring | 2002 fall | ... I learned more math this semester than in any other before. ... Math in Moscow was awesome ! ... Math in Moscow is a wonderful program that I would recommend to anyone seriously interested in mathematics. ...

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... In April 1991, the five-member crew of STS-37 encountered a problem deploying the Gamma Ray Observatory (GRO), one of four of NASA?s Great Observatories which also included the Hubble Space Telescope (HST), the Chandra X-ray Observatory, and Spitzer Space Telescope. ... For more information on this exciting mission, be sure to read the interviews conducted with Ross and Nagel, available on the JSC History Portal: http://www.jsc.nasa.gov/history/oral_histories/oral_histories.htm . ...

. Comment on J1842+7946 . Comparing the brightnesses of the two main features seen in our 5 GHz image with higher frequency VLBI images available in the literature (at 8.4 GHz from the USNO database and at 15 GHz by Kellermann et al. (1998)), one can conclude that the NW component has a steeper spectrum since the SE one becomes relatively stronger as the observing frequency increases. VLBApls home page . Last modified: 16 Oct 2000

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