... Tonight's Sky . ... The Magazine . News . Observing . ... Community . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... The Golden Earring, planetary nebula NGC 2867, and barred spiral galaxy NGC 3109 . ... Astronomy for Kids . ... planetary observing . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... WFC3 Data Handbook > Chapter 8: Persistence > 8.2 Evaluating the Amount of Persistence in Science Images . ... The tools produce an html file summarizing the amount of persistence in the image as well a several fits files that can be used in downstream analysis of the HST data. ... We define external persistence as persistence that is generated by an earlier visit, and internal persistence as persistence generate within the same visit as the image. ... Prediction of external persistence . ...

... On some space shuttle missions, there are opportunities for observers in the continental United States and Hawaii to see the orbiter fly overhead. ... The second item is a Space Shuttle Mission Chart, which is a Mercator projection map of the world with the orbiter's orbits superimposed on Earth's surface. ... Shuttles are launched from the Kennedy Space Center in Florida, which is at a latitude of 28.5њ north. ... NASA Johnson Space Center . ... You will see that Shuttle orbits just graze the globe...

... The RtFC depends on 4 distributed programs to transfer data from LBADR or Mark5 recording systems to a central location, and then invoke the DiFX software correlator. ... Generally run on the same machine as corr.pl. corr.pl . ... obs.pl runs an external programs (vsipack) to extract the requested time fragment from the (large) data files and optionally "compress" the data (select a sub selection of the data channels) before transferring. ... To run the system first start control.pl, then corr.pl. ...

Next: Quantum Efficiency Correction (a.k.a. Up: ROSAT HRI Recipes Previous: Appearance of new HRI . The mean pulse height analyzer channel (PHA) of a spectral distribution will vary depending on its location on the detector. Below is a method to compare observed data with that of preflight calibration measurements. ... For temporal gain variations, see The HRI Calbration Report . ... Retrieve the gain maps (mean PHA) from anonymous ftp at SAO. ... But don't forget temporal gain variations!] ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... Publications of the ASP (PASP) . ... A Minor Planet's Night Out . ... Orbiting between Mars and Jupiter are thousands of rocky bodies. ... In 1804 came Juno; in 1807, Vesta. ... Most minor planets, as asteroids are sometimes affectionately called, hum in elliptical orbits between Mars and Jupiter. ... This helps us as we select the Guest Observer, and it helps readers to understand what you studied. ...

... Observing . ... This Month's Sky . ... This Month's Sky - 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... In cooperation with the New York City Department of Parks, the United States National Park Service, and other organizations, the Amateur Astronomers Association holds observing sessions at several locations in and around New York City. ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by ...

ATMoB Awards Program - Messier Marathon Worksheet Observer: Date: Instrument(s) Used: Location: Messier Observing Catalog/Worksheet Observing Order 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Messier Number M 77 M 74 M 33 M 31 M 32 M110 M 52 M103 M 76 M 34 M 45 M 79 M 42 M 43 M 78 M1 M 35 M 37 M 36 M 38 M 41 M 93 M 47 M 46 M 50 ...

... Webb Society Deep-Sky Observer's Handbook, Vol. 2: Planetary and Gaseous Nebulae . ... Webb Society Deep-Sky Observer's Handbook by Kenneth Glyn Jones . Volume 2, Planetary and Gaseous Nebulae, 1979 . ... А вот здесь есть четвертый выпуск: http://depositfiles.com/ru/files/fji0trvjg%20 -Webb Society Deep-Sky Observer's Handbook, Vol. ... Webb Society Deep-Sky Observer's Handbook vol 4 . ... Webb Society Deep-Sky Observer's Handbook vol 3 Тады "Ой!" ...

... 12c. Venus transit (1) . 12d. Venus transit (2) . 12e. Venus transit (3) . ... 1 The 2004 Venus transit . ... Kepler's third law allows one to evaluate the dimensions of the solar system in relative units, e.g. in " astronomical units " (AUs), where 1 AU is the mean Sun-Earth distance. ... Edmond Halley suggested using the transit of Venus across the Sun's disk, when it appears as a dark round spot --or to quote one observer of the 2004 transit, "like a blueberry in front of an orange." ...

... Hybrid Solar Eclipse . ... April's spectacular geocentric celestial event was a rare hybrid eclipse of the Sun - a total or an annular eclipse could be seen depending on the observer's location. ... Mira: The Wonderful Star . ... Cassini Spacecraft Crosses Saturns Ring Plane . ... Later that century, it became understood that Saturn's unusual protrusions were rings and that when the Earth crosses the ring plane, the edge-on rings will appear to disappear. ... The Hercules Cluster of Galaxies . ...

... 2005 May 6 . Hybrid Solar Eclipse . ... Explanation: April's spectacular geocentric celestial event was a rare hybrid eclipse of the Sun - a total or an annular eclipse could be seen depending on the observer's location. For Fred Espenak , aboard a gently swaying ship within the middle of the Moon's shadow track about 2,200 kilometers west of the Galapagos, the eclipse was total, the lunar silhouette exactly covering the bright solar disk for a few brief moments. ... About APOD | ...

... Note: Click here a longer, much more comprehensive overview of the polar aurora . ... Magnetic Field . ... Aurora . ... 3b. Fritz Aurora . ... Electrons . ... Typical aurora (Dick Hutchinson ї) . In Alaska, Canada, Norway, Finland or northern Russia, on a clear night, a greenish glow is often seen in the sky, known as the "Northern Lights." ... Auroral light is produced at a height of about 100 km (60 miles) when fast electrons, arriving from space, slam into atoms and molecules of the atmosphere. ...

XMM-Newton Multi-Target Visibility Checker, V8.0 for AO7 . Revolution : . ... Observers Info ToO Alert ToO Details Proposal Enhancement Long Term Plan Short Term Schedule Scheduled Observations Search Scheduling Guided Tour Observation Log Browser . ... Single Target Visibility - calculate visibility using a known RA Dec coordinates . ... The output information can be reduced by specifying restrictions like range of revolutions and minimum visibility time for the target. ... eg; Abell 1750) . ...

... MRO Users Manual . Observers Checklist . ... Getting to MRO . ... MRO Home . ... The Manastash Ridge Observatory (MRO) is located approximately 9 miles West-Southwest of Ellensburg, WA. ... MRO is operated by the Astronomy Department of the University of Washington for the training of graduate and undergraduate students as well as for astronomical research. ... Students who use the observatory must learn the basics of astronomical observing as well as the care and operation of the instrumentation. ...

The Zone of Avoidance (ZOA) Survey . ... Observer's log for commensal observing with a2004 . ... Data reduction log for commensal observing with a2004 . Data reduction log for commensal observing with a2055 . Data reduction log for commensal observing with a2056 . ... Observing the ZOA with ALFA - Commensality with GALFA (13Jul05) . Data reduction for ZOA survey with ALFA - LiveData (13Jul05) . Data reduction for ZOA survey with ALFA - Gridzilla (19Jul05) . ... ZOA web page . ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Telescopes . LX850 Series . ... Superb optical performance coupled with time proven computerized pointing and tracking has made the LX200 ACF series a best-seller in the high-performance telescope class. ... LX70 Series . ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... LightBridge Series . ...

A time adjustment from the Earth's centre to the observer's location is quantified and shown to improve the residuals between the observed time of pronounced Leonid showers and the time calculated from perturbed dust trails. A correlation with the exact time of closest approach to the nominal dust trail orbit would allow a further improvement in the residuals. ... These results indicate that approaches to dust trails within 0.0005 AU are predictable with an uncertainty of around 5 minutes. ...

... This applet generates an observing list based on an observer's location and time. ... To use this program, enter in your location, and the local times at which you wish to begin and end observing. The date you enter should correspond to the calendar day at the time at which you begin observing. For example, if you wish to observe from 9:37 PM October 23, 2007 until 3:21 AM October 24, 2007, you would enter 21:37 for the starting time, 03:21 for the finish time, and 10/23/2007 for the date. ...

... They are concerned with Attitude Control System of the spacecraft, satellite visibility from tracking stations, limits on the satellite autonomous operations during the orbit, and needs for auxiliary operations with the spacecraft. ... Among the operational constraints the most important one is the number of programmed slews per orbit, which determines the maximum number of radio sources to be observed during one orbit. ... System temperature (K) . ... Progress of the RadioAstron Project in Pictures...