... Bad Astronomy . ... Bitesize Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... At what rate are photons collected when HST is viewing objects billions of light years away? ... Part of my job is to figure out exactly this number-- for an object of a given brightness, how many photons do we see in our camera aboard Hubble? ... Even over the area of Hubble's 2.4 meter mirror, only a handful of photons are counted every second. ... 2008 Phil...

... Editor's note: This activity is both on the Astrocappella web site and the CD-ROM featured in this article. ... Every student can demonstrate the Doppler effect! ... splash out' ball** . ... Twist the 'splash out' ball open. ... This effect can occur with both sound and light, because both sound and light reveal wave- like behavior. ... The number of waves reaching an observer in one second is called the frequency. ... What has the Doppler shift told astronomers about the expansion of the universe? ...

... These are just the bare bones--just three basic ideas and rules for handling relations ("equations") involving unknown quantities whose values you are trying to find. In most calculations you try to find a number . ... To get a solution, one must replace the given equation (or equations) with others, containing the same information but cleaner in appearance. ... If you have an equation and modify both its sides in exactly the same way, what you get is also a valid equation. ...

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lsst.tcc љ 1.2.2-3-g89ecb63 . ... Files . ... python . ... util . runningStats.py . ... 12 љ def __init__ (self, bufferSize=1000, callEvery=500, callFunc=None): . ... 20 љ self. _buffer = collections.deque(maxlen=bufferSize) . 21 љ self. _counter = 0 . ... 30 љ self._buffer.append(val) . ... 32 љ if self. _counter >= self. callEvery and self. callFunc : . ... 57 љ counter = self. _counter , . ... tcc.util.runningStats.RunningStats._counter . ... tcc.util.runningStats.RunningStats._buffer . ...

RELATIVE SUNSPOT NUMBERS Description of Data from SGD Explanation of Data Reports: Relative Sunspot Numbers -- The relative sunspot number is an index of the activity of the entire visible disk of the Sun. ... The provisional daily Zurich relative sunspot numbers, Rz, were based upon observations made at Zurich and its two branch stations in Arosa and Locarno and communicated by M. Waldmeier of the Swiss Federal Observatory. ... This indicates the uncertainty above and below the predicted number. ...

This module provides support for dynamically configured mass virtual hosting . ... Source File: mod_vhost_alias.c . ... For simple name-based virtual hosts you might use the following directives in your server configuration file: UseCanonicalName Off VirtualDocumentRoot /usr/local/apache/vhosts/%0 . A request for http://www.example.com/directory/file.html will be satisfied by the file /usr/local/apache/vhosts/www.example.com/directory/file.html . ... Module: mod_vhost_alias . ...

Pulkovo Photographic Plate Database . To find a certain plate, type its number, choose instrument and click button FIND Instrument: Normal Astrograph 26-inch refractor Plate number: . To find plates with a certain sky area: choose instrument, type coordinates (R.A. and Dec.) of the center of this area, type radius of this area, type (optionally) names of required objects, and click button FIND . ...

... 2013: . Evidence for the connection between turbulent gas motions and star formation in dwarf galaxies . ... Moiseev A.V. "Ionized gas rotation curves in nearby dwarf galaxies", Astrophysical Bulletin, 2014, Volume 69, Issue 1 . Moiseev A.V., Tikhonov A.V., Klypin A.A. "What controls the ionized gas turbulent motions in dwarf galaxies", submitted to MNRAS . ... Determination of the mass of a supermassive black hole in AGN Mkn6 based on spectro-polarimetric observations . ... Archive . ...

The preliminary version of documentation of the format for the interchange of calibrated optical/IR data being developed by Tom Pauls of NRL and John Young of COAST was presented and a number of issues discussed. The proposed format is in the general form of a relational database with different components stored in FITS binary tables. ... Should there be a single data table type that includes all data types, or multiple table types, one per data type? What data types are needed? ...

... History-NASA Centers . ... STS Recordation Oral History Project . This effort involved the collection of history from key individuals formerly and currently associated with the agency?s Space Shuttle Program (SSP), focusing on the Space Shuttle Orbiter and its related components. ... Space Shuttle Main Engines Chief Engineer and Project Manager, Marshall Space Flight Center, Huntsville, AL . ... Space Shuttle Main Engines Project Manager, Marshall Space Flight Center , Huntsville, AL . ...

Astronomy Discussion Forums . ... Let Me Be More Clear . ... Post Message | ... However, if I have identified it, how do I know this 'thing' is something that exists versus only thought of as existing? ... However, by me identifying 'red' as 1 (i.e., as I originally did), I am assuming that there is 'red' as something that exists. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Recent Topics . ... MAO main . ... The third-order space-by-time relation . ... Тема: The third-order space-by-time relation . ... The mass m experiences a gravity force toward the sun and . ... will experience the Coriolis force or Coriolis acceleration. ... differentiated space-by-time twice and discovered equation2. ... If one differentiates . ... time differentiation of space-by-time. ... third-order space-by-time relation. ... understand the third-order space-by-time relation. ... MAO NASU . ...

... Asteroid . ... In case you didn't hear about it, which you probably didn't: On Jan. 7, an asteroid 1,000 feet across -- nearly three times the current diameter of Marlon Brando -- barely missed the Earth, which is most likely your planet of residence. ... What if this asteroid had hit the Earth? ... As it happens, the American Astronomical Society was holding a conference in Washington AT THE VERY SAME TIME as the asteroid nearly hit the Earth. ...

... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Imaging Basics . ... The right number of images . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

... The evolution of a binary system can be described as the movement of a point in the parameter space , constituting both physical quantities (such as masses of binary components, their radii, luminosities, orbital period, etc., independently of direct observational measurability of these values Each binary traces a path (which we will call a ``track'') in this space, in a way strictly determined by the evolutionary scenario. ... Then the fraction of binaries lying inside is expressed by . ...

Home About Meade Product Information Dealer Locator Customer Support Investor Relations Dealer Support Employment Opportunities Site Map . Meade Instruments Corporation . ... Meade Pictor XT-Series CCD Autoguider/Imagers . Section 13: Viewing and Processing Images . ... The software can read most images in these formats, and convert between them using the File, Save As command. ... This is done by placing the information in a .txt file with the same name as the image file). ... Merge Images: . ...

SIMPLE = T / file does conform to FITS standard BITPIX = -32 / number of bits per data pixel NAXIS = 2 / number of data axes NAXIS1 = 1138 / length of data axis 1 NAXIS2 = 1114 / length of data axis 2 TELESCOP= 'UT1 ' PI-COI = 'C. Cesarsky' / Name of PI and COI ORIGIN = 'ESO/EIS ' / Data processed by RA = 53.0917713808546 / RA (J2000) at start (deg). ... RADECSYS= 'FK5 ' / Coordinate reference frame. ... TOT-IMAG= 125 / Total number of images. ... MOSTILES= 21 / Total number of tiles in MOSAICID. ...