... 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....

... It becomes A bipolar region is involved. Positive fragments Start of the data set. stronger and bigger. move toward the negative ones, and some of them touch each other. ... Positive fragments, which just disappeared, emerge again and become stronger at the side of the negative ones. ... The main positive and negative fragments become closer. ... Some negative fragments move toward the positive ones and cancellation occurs. ... The positive fragments begin to move toward the main negative ones. ...

The ZotGuide Series: ClayFighter [SNES] by the Zotmeister (Adam R. Wood, zot@ccs.neu.edu) Version 6 Joypad: D=down, U=up, T=towards opponent, A=away from opponent two adjacent letters represents the appropriate diagonal hold = hold the pad down in that direction for about 2 seconds minimum before continuing (except where noted) Buttons: P=punch, K=kick Usually, light attack buttons execute shorter and/or slower versions of the special moves than when stronger attack buttons are used. ...

... About ATNF overview . ... Australia Telescope Steering Committee . ... Towards a Truly Unified Model of AGN: . Aspect, Accretion and Evolution . ... The Unified Model holds that the aspect-dependent effects primarily determine the nature of the active galactic nucleus that we observe. In this paper, I argue that three parameters; aspect, accretion rate into the nuclear regions, and the evolutionary status of the central black hole hold the key to unification. ... Evolution and Aspect . ...

... SSAU History . SSAU roadmap . ... Student clubs . ... On June 27 SSAU student Vladislav Kozlov has become the winner in a medley relay of 4x100 meters at the European Games in Baku within the Russian team in swimming. ... Vladislav Kozlov, the first year student of SSAU Institute of Electronics and Instrumentation, at the last stage of freestyle swim managed to bring victory to his team ahead of the English and Polish sportsmen. ... e-mail: ssau@ssau.ru . http://www.ssau.ru . ...

... Towards a Truly Unified Model of AGN . ... The Unified Model holds that the aspect-dependent effects primarily determine the nature of the active galactic nucleus that we observe. ... The full postscript file can be obtained here: . The PASA Latex file can be obtained here: . The postscript file of Fig 1 can be obtained here: . ...

... First US Spacewalk . ... In 1965, forty years ago on June 3rd, astronaut Edward White made the first U.S. spacewalk. ... M27: The Dumbbell Nebula . ... Eta Carinae, one of the most massive and unstable stars in the Milky Way Galaxy, has a profound affect on its environment. ... About 1,600 light-years away, in a binary star system fondly known as J0806, two dense white dwarf stars orbit each other once every 321 seconds. ... The Trifid Nebula from CFHT . ... A Great White Spot on Rhea . ...

Congratulations to Andrew Fraknoi, former Executive Director of the ASP, currently chair of the Foothill College astronomy department, for his selection as an honorary member of the Royal Astronomical Society of Canada. ... Andy has been so honored for his long-standing work in helping people understand astronomy, says Colin Haig, RASC Vice President. ... And we salute him in his new guise as an honorary member of the RASC! ...

... Archives . ... People . ... But it has general description to become a good person and scientist . To Become a Good Astronomer . ... Some) aggressiveness and self-confidence are good things to have, and you should for instance not hesitate to insist that promises which have been made to you be kept. ... Tags: astronomers , good . ... Comment ( RSS ) | ... Entries RSS . Comments RSS . ... General comments . ... nestor on People . ... Chandra Blog . ... Entries (RSS) and Comments (RSS) . ...

... While there is practically no detector noise present at energies above , X-ray data below are considerably contaminated by noise events, which become more and more dominant towards the lowest transmitted energies (Fig. ... Investigations of 40 hours of in-orbit calibration data with the filter wheel closed, taken over a period of more than two years, showed that the noise properties vary with position and energy, but are fairly stable in time for most areas on the detector. ...

... Editor's choices for the most educational Astronomy Pictures of the Day about Earth's Moon: . ... Explanation: Our Moon's appearance changes nightly. This time-lapse sequence shows what our Moon looks like during a lunation , a complete lunar cycle. ... APOD: 2003 May 22 - Eclipsed Moon Montage . Explanation: After watching this month's lunar eclipse, amateur astronomer Sebastien Gauthier carefully composed this montage of telescopic images of the Moon sliding through planet Earth's shadow. ...

abstract: ABSTRACT We examine the criterion for selfgravitational fragmentation in the protostellar disks through which massive stars accrete. ... We find that for a broad range of protostar masses and for reasonable accretion durations, massive disks larger than approximately 100 AU are prone to fragmentation. ... If high angular momentum is the norm, then disk fragmentation may starve accretion in massive stars and create a subpopulation within massive clusters. ... 2002, ApJ, 566, 982 ...

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. LX90 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. ... Coronado Accessories . ...

Computers become more and more popular nowadays. That means that the amount of people who are able to work with computer programmes and play computer games has increased. In many cases computer games are the only thing that a person is accustomed to. ... As a result of this epidemic "homo playing" may put on the isoreality helmet which makes a person, crazy about games, forget about food, slumber and all other components of real life: "homo playing" becomes isolated from community. ...

Circling around magnetic field lines. ... The ring current . Because positive ions and negative electrons drift in opposite directions (see drawing), that motion will create an electric current that circulates clockwise around the Earth when viewed from north. ... How then can the radiation belt and ring current arise? ... Electric fields are able to push trapped particles earthward, and unlike the purely magnetic motion described earlier, an electric field can also energize them. ...

... Home Observing Brooklyn Museum Plaza . ... Lecture Series 2014-2015 . ... Clear Sky Chart . ... This Month's Sky - 2015 . This Month's Sky - January 2015 . ... This Month's Sky - March 2015 . ... Brooklyn Museum Plaza . ... 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 . ...

... Based on the most detailed study ever made of the internal structure of a small interstellar cloud, three scientists from ESO and the USA [1] have found that it is apparently on the verge of becoming unstable - and thus in the stage immediately preceding a dramatic collapse into a dense and hot, low-mass star. Interestingly, the current structure of this cloud, a "Bok globule" known as Barnard 68 (B68) [2] , is governed by the same basic physics as is that of a star. ... ESO PR Photo 02a/01 . ...

... 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. ...

... Judged by their instrumental profiles, spectrometers fall into two basic classes---Lorentzian and Gaussian---with many other line profile functions (sinc functions, Voigt functions, Airy functions, etc.) falling into one of these two categories in some limit. We demonstrate that the Rayleigh, Sparrow, and Houston resolution criteria are of limited use compared to the ``equivalent width'' of the line profile. ... Rayleigh criterion. ... All of these functions have continuous higher derivatives. ...

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Towards a direct measurement of the expansion history of the Universe . ... Science Users Information . ... Observing with ESO Telescopes . ... Science Software . ... ESO Science Newsletter . ... The E-ELT will allow us, for the first time, to perform a direct and dynamical measurement of the expansion history of the Universe. ... Return to list of thesis topics . ...