... Milky Way . ... Science Fiction . ... Karl Guthe Jansky (1905-50) was born in Norman, Oklahoma; he was of French, Czech and English descent and grew up in Madison, Wisconsin.б? Jansky was the third of six children and was named after physicist Karl Guthe whom his father Cyril Jansky had worked for earlier in his career.An interest in science and physics was perhaps in KarlБ€?s genes as Cyril Karl Jansky Б€?Radio Astronomy, I am your fatherБ€? (Image credit:Wikimedia.org) . ...

... Some existing (e.g., USNO-A1.0) and most of the upcoming catalogs (e.g., GSC-II SDSS , GAIA ) contain data for half a billion up to several billion objects. ... Here we present methods for structuring and searching very large catalogs to provide fast access to the coordinate domain of the parameter space. ... By generalising such methods it is also possible to produce catalog structures and indexes for accessing a multi dimensional parameter space. ...

... Home Observing This Month?s Sky This Monthт??s Sky т?? April 2016 . ... Lecture Series 2014-2015 . ... This Monthт??s Sky т?? ... This Month's Sky - 2015 . This Month's Sky - January 2015 . ... April 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... This is a personal project collecting and documenting early images of Harvard College Observatory, focusing on the site at Observatory Hill (previously Summer House Hill). ... This list of references is long in part because each web-based image source is viewed as a separate reference, even though half or more come from Harvard Libraries, through their Visual Information Access (VIA) . ... History of the Harvard College Observatory During the Period 1840-1890. 1890. baker90 . ... The Harvard Crimson...

... I see the same problem all the time in undergraduate assignments: someone comes up with an answer that is clearly, wildly, hopelessly wrong (e.g. the mass of some star is 0.7 kg, or an asteroid is travelling at 1010 m s-1 (faster than light), or the Earth took 1011 years to form (much longer than the age of the universe). ... This means that every valid equation should work equally well, regardless of the units you use (as long as they are self consistent). ... Do you think this could be correct? ...

This custom-made "octopus" cable connects one Canoga-Perkins CMX-808 fiber-optic RS-232 multiplexer to a patch panel or 8-port harmonica with 6-wire 6-position RJ11 jacks. The patch panel or harmonica must be USOC-wired and have a male Telco connector, since this cable has a female Telco connector. ... 1 Female 50-pin Telco Connector . Each leg is two feet (2') long unless otherwise specified. ... Use of twisted pair wire is optional, but if it is used, it must be used as shown in the table. ...

Swift/ XRT radiation damage and results from the lab using a proton-damaged CCD Claudio Pagani (Swift/ XRT team) XMM Calibration Meeting, Leicester, 7/3/2012 XRT CCD e2v CCD -22 detector (developed for EPIC MOS camera on XMM) Operated in Photon Counting (PC) and Windowed Timing (WT) mode 4 55Fe corner sources continuously illuminate CCD corners, used to monitor CCD performance Spectral resolution at launch: FWHM = 135 eV at Mn K- (5.9 ...