Optical and UV Spectrophotometric Standard Stars . ... Apache Point expresses its thanks to J. R. Walsh and to ESO for allowing us to place a copy of these pages at Apache Point. ... Access to the standards is either through: . ... The data for the standard stars come from four sources: . ... Data for 23 stars based on IUE and optical spectra and calibrated by the primary WD standards. ... The data from which the plots were produced are also available by ftp access from the standard star pages. ...

... Courtesy of NASA/ESA Observation data (J2000 epoch) Constellation Right ascension Declination Redshift Distance Type Serpens Caput 15h 17m 14.4s[] +21° 35 08[] 12,740±50 km/s[][1] 600±30 Mly (183±8 Mpc)[1] SA0(r) [citation needed ] [a] Apparent dimensions (V) 0.28 в 0.28[] Apparent magnitude (V) 16.0[] Notable features Ring galaxy Other designations PGC 54559,[] PRC D-51[] See also: Galaxy, List of galaxies Hoag's Object is a non-typical galaxy of the type known as a ring galaxy. ...

Кометы сформировались 4.6 миллиарда лет назад, когда планеты только начинали принимать форму, и они сохраняют информацию о химических и физических процессах, происходивших в то отдаленное время. ... Contour также изучит, как кометы ведут себя, когда приближаются к Солнцу, и их льды начинают испаряться. ... В редких случаях, комета изменяет орбиту и приближается к Солнцу. ... Contour имеет три цели, кометы Энке, Швассмана-Вахмана 3 и д'Аррэ, которые являются частью Юпитерианского семейства комет. ...

... 000, 1­12 (2009) Printed 11 February 2010 A (MN L TEX style file v2.2) Analytical approximations of K -corrections in optical and near-infrared bands I1gor V. Chilingarian1 2 ,2,3 , Anne-Laure Melchior 1,4 and Ivan Yu. ... Received 2010 February 01; in original form 2009 August 14 ABSTRACT To compare photometric properties of galaxies at different redshifts, the fluxes need to be corrected for the changes of effective rest-frame wavelengths of filter bandpasses, called K -corrections. ... Table 1. ...

... This oral history session is being conducted with Chris Kraft in Houston, Texas, as part of the NACA [National Advisory Committee for Aeronautics] Oral History Project, sponsored by NASA Headquarters History Office. ... As an example, it was obvious that the use of wing sweep was going to be a major part of the future airplanes of that age, and all of that was confidential. ... As you know, the cowling, as an example, was an invention of NACA, and it changed the look of modern airplanes in those...

Observational Log Cover Sheet Observation Date: Location: Observers: Jan 02, 2016 Home Myself Moon Phase: Seeing: Transparency: Notes: Unknown Unknown Clear At 2130 hours I took out a pair of binoculars and looked at M41. This was the last DSO on the Astronomical League Urban Skies list. I have a few double stars to observe and the entire list will be complete. Page 1 of 265 Observational Log Cover Sheet Observation Date: Location: Observers: Dec 05, 2015 Home Myself Moon Phase: Seeing: Transparency: Notes: