... Tonight's Sky . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Bright planets meet at dusk . ... Astronomy magazine subscribers can read the full article for free. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

THE 75th NAME-LIST OF VARIABLE STARS. ... The 75th Name-List consists of two tables. ... the literature, taken from positional catalogues, including USNO A1.0/A2.0 and GSC, or determined by the authors); the range of variability (sometimes the column Min gives, in parentheses, the amplitude of light variation; the symbol ( means that the star , in minimum light, becomes fainter, than the magnitude indicated); and the system of magnitudes used ( P are photographic ...

Astronotes Armagh Planetarium's Stellar Blog! ... Planets . ... Our Galaxy . ... Weird and Fun . ... It came from another galaxy: This artistтАЩs impression shows HIP 13044 b, an exoplanet orbiting a star that entered our galaxy from beyond. ... HIP 13044 is one of tens of millions of stars in the тАЬHelmi streamтАЭ, stars that belonged to a dwarf galaxy consumed by our own Milky Way galaxy, some six to nine billion years ago. ... Tweets that mention ESO finds weird doomed planet from another galaxy | ...

Human history becomes more and more a race between education and catastrophe. ... Dr. Connolly's column made us think about important education issues and at the same time pointed us to new developments in astronomy education. ... Four great resources are ASP's education webpage , its quarterly teachers' newsletter Universe in the Classroom , the page for astronomy teachers maintained by Andrew Fraknoi, and the education page at the American Astronomical Society . ...

. Quantum clock (atomic clock) - the time measuring device containing quartz generator, controlled by the quantum frequency standard . Atoms play a role of pendulum. The frequency of atoms radiation while the atoms passing from one energy level to another regulates the quantum clock. This frequency is so stable (error 10^-11 - 10^-13) that quantum clocks allow to calculate the time more exactly, then astronomic methods. Back .

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

The fonts contained in this archive are Freeware. ... Sure, but a donation or a product sample would be appreciated. ... Larabie Fonts End-user license agreement software product from Larabie Fonts --------------------------------------------------- SOFTWARE PRODUCT LICENSE The SOFTWARE PRODUCT is protected by copyright laws and international copyright treaties, as well as other intellectual property laws and treaties. ... You may install and use an unlimited number of copies of the SOFTWARE PRODUCT. ...

... Basic String Handling Functions . ... Character conversions and testing: ctype.h . ... char *stpcpy ( const char *dest, const char *src) -- Copy one string into another. int strcmp( const char *string1, const char *string2) - Compare string1 and string2 to determine alphabetic order. char *strcpy( const char *string1, const char *string2) -- Copy string2 to stringl. char *strerror( int errnum) -- Get error message corresponding to specified error number ...

... Hook, R. N. Walsh, J. Pirzkal, N. Freudling, W. IRAF, polarimetry, image: analysis, image: restoration, spectroscopy, GRISM data analysis . We have collected together many of the astronomical applications developed as IRAF tasks at the Space Telescope European Coordinating Facility (ST-ECF) into a new IRAF layered package called ``stecf". ... stecf.nictools - NICMOS GRISM Tools . ... stecf.impol - an IRAF Imaging Polarimetry Reduction Package . ... stecf.impol - Package Tasks . ...

... Space flight . Crew training . ... Space camp . ... acquiring practical habits and skills of performing all the flight operations envisaged for a flight participant; . maintaining and honing professionally required qualities and skills for a successful activity in conditions of effect of adverse factors of a space flight, as well . ... preparing for the activity outside the spacecraft; . ... preparing for professional activity in conditions of effect of the space flight factors; . ...

This course is designed to expose incoming students to the Internet and the resources that it contains. ... Clearly, one's global view is intimately shaped by one's own view of the relationship between Man and Nature. ... The point is then to compare these two opposing views against a body of scientific data about the Natural World in order to have students develop a line of moral reasoning about the future which is based on science, not prejudice, superstition or ego. ...

... ON THE ROLE OF LARGE-SCALE PLASMA IRREGULARITIES AT THE FINAL STAGE OF ANOMALOUS ABSOPTION DEVELOPING UNDER HF HEATING OF THE IONOSPHERE . ... Fig. ... With the aid of numerical statistical modeling based on multiple ray tracing it is shown that in presence of large-scale irregularities the reflected signal amplitude mean value is increased significantly. ... Dependence of the mean amplitude of the reflected from the ionosphere signal on the large-scale (10-50 km) electron density irregularity level...

... IONOSPHERIC DATA IN THE INTERACTIVE SPIDR SYSTEM . ... The Ionosphere The ionosphere is that part of the upper atmosphere where free electrons occur in sufficient density to have an appreciable influence on the propagation of radio frequency electromagnetic waves. ... These regions may be further divided into several regularly occurring layers, such as F1 or F2. ... E Region: The region between about 95 and 150km above the Earth that marks the height of the regular daytime E layer. ...

... public class Tools . ... Tools () . ... static java.lang.String . ... Converts a Color to an 7 byte hex string starting with '#'. public static java.lang.String f2hex (float f) . Converts a float to an 9 byte hex string starting with '#'. public static double[] getMinMax (double[] a) . ... Converts the float array 'a' to a double array. public static float[] toFloat (double[] a) . Converts the double array 'a' to a float array. public static java.lang.String fixNewLines (java.lang.String s) . ...

According to the # 7.1. of the Acting Statutes/Regulations on the International Astronomy Olympiad there should be an Authorized National Representative (Astronomical) Organization (ANRAO) in every participating state: A national astronomical society, a department (section) of the EAAS or IAU in the state, a leading observatory, an astronomical department of a leading university, a ministry of education or another appropriate competent institution. ...

... For example, as pointed out by Perlman et al. (1996b), the lack of a Ca II H & K break strength criterion in the 1 Jy, S4 and S5 samples of BL Lacs, has caused numerous objects to be misclassified as radio galaxies instead of BL Lacs (see also March? Browne 1995, 1996). ... While one may argue that some of these objects fall in the expanded region of the (H & K break strength, equivalent width) diagram that March? et al. (1996) allot to the BL Lacs, several, for example 1 Jy 1308+326, do not. ...

. Storage Container Delivery: March 26, 2001 . The storage container was delivered and installed. Move in date is soon. The box was swaying a bit and came close to the tree but it was a snug fit. Last several pictures show how the container looks from the dorms. Below left, existing damage.

... NIS / NIS+ . ... Radius . ... There is an NIS / NIS+ HOWTO at: http://metalab.unc.edu/LDP/HOWTO/NIS-HOWTO.html , and O?Reilly has an excellent book on the subject, "Managing NFS and NIS" . NIS / NIS+ runs over RPC which uses port 111, both tcp and udp. ... ipfwadm -I -a accept -P udp -S 10.0.0.0/8 -D 0.0.0.0/0 111 . ... Kerberos is a modern network authentication system based on the idea of handing a user a ticket once they have authenticated to the Kerberos server (similar to NT?s use of tokens). ...

... Shockproof Plastic Battery Storage Box Container Case for 16340 / CR123A Battery . ... Package Contents: 1 x Battery Case, 1 x Strap, 1 x Keyring, 1 x Carabiner . ...

The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...