The Earth's Orbit . The shape and orientation of the Earth's orbit around the Sun are also changing, under the influence of the other planets. ... The perihelion and aphelion are precessing, advancing eastward along the ecliptic about 11 arcseconds per year in relation to the fixed stars. ... The change in eccentricity, plus the changing relation between the perihelion and aphelion of the Earth's orbit and the equinoxes and solstices, change the duration of the seasons. ...

... Want to observe? ... TO IMPACT OF THE PLANET TO THE EARTH ANGLE OF THE PLANET OF THE SUN YR MT DAY H M S S IN RJ " H M S DEG ' " AU HR DEG DEG DEG DEG 2009 7 24 0 16 46. 1 ECL 2 P 0.367 294 6.3 0.496 21 49 34.53 -14 14 7.5 4.099283 -1.865 -28.5 17.4 176.0 -15.7 2009 7 24 1 15 9. 1 OCC 2 P 0.214 446 5.8 0.525 21 49 33.49 -14 14 13.3 4.099023 -0.889 -13.8 20.5 -169.8 -15.2 2009 8 12 1 54 2. ... International Year of Astronomy, Ireland National Node . ...

... This survey will using the 3.5 and 0.9m telescopes of the WIYN Observatory to conduct an unbiased survey for dwarf galaxies. ... What percentage of low mass galaxies experience starburst (SB) episodes? ... There are two kinds of galaxies, those that SB and those that don't. Need a survey that identifies both kinds? ... Therefore, you need to survey a large area to have a sufficient volume to find enough dwarfs. ... Low mass galaxies are very rare, so we need to cover a lot of area. ...

XMM­Newton CCF Release Note XMM­CCF­REL­256 Rate­dependent CTI correction for EPIC­pn Timing Modes: SASv9.0 update M. Guainazzi August 27, 2009 1 CCF components Name of CCF VALDATE List of Blocks changed Change in CAL HB EPN CTI 0022 2000­01­01T00:00:00 RATE DEPENDENT CTI NO 2 Changes 2.1 Rate­dependent CTI correction This update of the EPIC­pn CTI CCF constituent includes a recalibration of the rate­dependent CTI correction for Timing Modes with SASv9.0. ...

... WIP is an interactive package with a simple to use interface designed to produce high quality graphical output. WIP was developed as part of the Berkeley-Illinois-Maryland Association (BIMA) project and is available via anonymous ftp. ... Included in the WIP distribution is a complete manual which contains several sample figures with associated commands, a frequently asked questions section, and a descriptive listing of all available commands. ... Figure illustrates WIP's ability to handle images. ...

April Draft 8, Version 2004 A Quick Start Guide To The Double Imaging Sp ectrograph (DIS) John C. Barentine Apache Point Observatory jcb@apo.nmsu.edu 1. ... We need to know several pieces of information from you: 1) Requested grating set 2) Wavelength centers of requested gratings 3) CCD binning or windowing April Draft 8, Version 2004 ­2­ 4) Slit choice 5) Any additional setup information (nonstandard slit and/or filter requests) Gratings are the cause of most confusion with novice DIS users. ...

... We examine the effects of amplifiers gain fluctuations, of fluctuations in the amplifiers noise temperatures, in the reference load tem­ perature and in the DC gain ratio. We find that 1=f gain fluctuations are suppressed by proper gain modulation, leaving fluctuations in the amplifiers noise temperatures as the main source of 1=f type noise. ... 4 Discussion and conclusions We have shown that the dominant source of 1=f noise in the radiometer output is amplifier noise temperature fluctuations. ...

. funcalc [-n] [-a argstr] [-e expr] [-f file] [-l link] [-p prog] [-u] <iname> [oname [columns]] funcen [-i] [-n iter] [-t tol] [-v lev] <iname> <region> funcnts [switches] <source_file> [source_region] [bkgd_file] [bkgd_region|bkgd_cnts] funcone [-n] [-x|-X|-j|-J] [[-l|-L] list] [-r ra_col] [-d dec_col] <iname> <oname> <ra[hdr]> <dec[hdr]> <radius[dr'"]> [columns] fundisp [-f format] [-l] [-n] [-T] <iname> [columns|bitpix=n] funhead [-a] [-l] [-s] [-t] [-L] <iname> [oname ename] funhist [-n|-w|-T] <iname>

... Printed in U.S.A. The Hipparcos and Tycho Photometric System Passbands MICHAEL S. BESSELL Research School of Astronomy and Astrophysics, Institute of Advanced Studies, The Australian National University, Private Bag, Weston Creek P.O., ACT 2611, Australia ; bessell=mso.anu.edu.au Received 2000 March 6 ; accepted 2000 April 17 ABSTRACT. Hipparcos and T ycho magnitudes have been extracted for many of the E-region standard stars. ... B [V regression for the E-region stars. ...

... 5-GHz total flux density . ... 0.003 * = the position has been determined to an accuracy of 10 mas from the VLBApls data . VLBApls image at 5 GHz . color gif | contour gif | ... Correlated flux density (Jy) vs. projected baseline length plot . gif | ... flux density (Jy) . EW position (mas) . ... major axis (mas) . minor axis (mas) . position angle ( ) . ... 0.0 . ... A source-specific comment is given in the VLBApls paper. VLBApls reference: Fomalont et al. ...