... Bad Astronomy . Misconceptions . ... Bad Astronomy : If the Sun collapses into a black hole, the Earth and all the other planets will get sucked in. Good astronomy : If the Sun were to collapse into a black hole, we would feel no difference in the gravity as measured at the Earth. ... The same applies if the Sun were to collapse into a black hole. ... Therefore, the gravity of the Sun felt at the Earth would remain the same. ... So it is with the black hole Sun. ... 2008 Phil Plait. ...

... Credit Copyright: NASA 's Goddard Space Flight Center , CI Lab Explanation: What happens when a star gets too close to a black hole? ... Although angularly unresolved, variations in high energy light indicate that some of the star became shredded and reformed into a disk swirling around the dark abyss. ... Publications with keywords: black hole - accretion disk . Publications with words: black hole - accretion disk . ... Two Black Holes Merge . When Black Holes Collide . ...

Armagh Observatory . ... Armagh, BT61 9DG . ... The closing date for receipt of applications: 31/05/2008 . ... Applications are invited for a fixed-term postdoctoral research position for up to 3 years to be held at Armagh Observatory beginning October 2008 or as soon as possible thereafter. ... Further information about Armagh Observatory and the current massive stars research programme may be obtained by consulting the Observatory's web-site or via email to Jorick Vink (jsv arm.ac.uk). ...

3) Planets and Brown Dwarfs . ... By its nature, this method is most sensitive to massive planets orbiting close to their stars. ... That means that some of the more massive extrasolar planets could actually be brown dwarfs (although the statistics of the finds suggest that most of them are not). ... Another possible difference between brown dwarfs and massive planets is how they are born. ... They would base the fundamental definition on the mode of formation: a planet is built from planetesimals. ...

ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... ATCA | ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... The Australia Telescope National Facility Colloquium . ...

. To see a Russian version of this page click here . (Senior Researcher. Graduated from Moscow State University (MSU) in 1982, Ph.D. 1986, MSU) . A member of EAS and IAU. Fields of interest: hot massive stars, close binary systems: optical photometric and spectral observations, X-ray observations; ill-posed problems, X-ray astrophysics. My publications (ADS link) . Linux on CLEVO 8750 (old stuff) . Phones/addresses of my university mates graduated in 1982. E-mail: igor@sai.msu.ru .

Laboratory of Stellar Physics . ... A study of close binaries with black holes, neutron stars and white dwarfs. ... A study of SS433 - the massive close binary with a black hole in the regime of supercritical accretion . ... A search for intermediate-mass black holes (IMBH). The black holes which are not supermassive black holes observed in quasars, and which were formed not in massive stars. ... A search for new magnetic stars, new CP stars, measurements of magnetic fields in stars . ...

... Dr. Stella Kafka . Thursday, Dec 10, 2015 at 8:00 PM . Type I Supernovae are massive stellar explosions that result from an interaction between a white dwarf and a companion whose mass it accrues in a close binary system. When the white dwarf’s mass reaches 1.4 that of the sun, the supernova occurs. ... Please join us for a pre-meeting dinner discussion at Changsho, 1712 Mass Ave, Cambridge, MA at 6:00pm before the meeting. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... These other worlds are the moons of our Solar System , of which there are approximately 170 in orbit around our planets.Some of these moons are very interesting, and have diverse and unique features, very different to our barren, heavily cratered Moon .Jupiter, the largest planet in our solar system has the most moons of any planet with known 64 moons in orbit.The four ... Ganymede, the largest moon in the Solar System thought to have oceans located underneath its icy surface.( ...

... Tonight's Sky . ... Observing . ... Star Atlas . ... Astronomy for Kids . ... How close to each other do two stars have to be for one to steal material from the other? ... For two stars of the same mass, if the donor starт??s radius exceeds 38 percent of the binary separation, the accretor will steal mass no matter the separation. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

Nova Herculis 1991, shown in this PSPC image, is a fast, high inclination, long period nova which contains a massive white dwarf and is part of an eclipsing binary system. Novae occur as part of the evolution of a close binary system in which the stars have different masses, i.e. a main sequence star and a white dwarf. Mass is accreted onto the white dwarf which eventually ignites runaway thermonuclear reactions which blow off the outer layers of the star. ...

... The hot component shows very spectacular activity: irregular outbursts accompanied by fast, massive outflows and jets. ... Diffraction-limited images for both components of CH Cyg binary system were reconstructed using visible speckle interferometry at BTA 6-m telescope (Fig.1). The orbital period 15.6 years and masses: 2.0 Msun and 0.7 Msun for red giant and white dwarf, respectively were derived from angular distance (0.042") and magnitude difference (2 m ) of the components. ... Fig.1. ...

... Archives . ... Discontinuation of weekly [arXiv] series . ... For a discipline that relies so heavily on images, it is rather surprising how little use astronomy makes of the vast body of work on image analysis carried out by mathematicians and computer scientists. ... images. ... Images may be Opened and Closed with different structure elements. ... Tags: close , dilate , EotW , Equation , Equation of the Week , erode , Morphological operator , open , set theory . Category: Imaging , Jargon | ...

... 5 1/ 2 Closing the feedback lo op: 1st option · Feedback efficiency 2NepEep f = Lp 4 3 w1 R 3 E1 w2 c E2 ( Eep E1 if E1 E2) · Pair pro duction rate Nep = · Soft (synchrotron from secondary pairs ) photon field: Eep 2 eB E2 1/2 f w w b , w2 = Es = 4 Es 2 mec2 mec · Hard ( inverse Compton from primary pairs ) photon field: 2 2 wb 3 R w1 , E1 = 3 2Ts wb = 4 R T ct 0 0 mec2 wb is thermal background energy density ...

Blackholes Forum Message . ... Good Question. ... We really don’t know what causes gravity ( mass properties ) only how it works in the present universe state. ... It may be that you have just proven your assumption is wrong and gravity/mass properties do depend on the present universe state to exist. ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

The revision of the MASS/DIMM star catalogue N. Shatsky, V. Kornilov March 16, 2008 Abstract The compilation of the (updated) version of the MASS (MASS/DIMM) device target catalogue is described. ... Then the list was cleaned according to following criteria: I. Remove stars too faint for a MASS device. ... Here the color equation of the Sternb erg device was taken: M AS S mag = V mag + 0.45 (B - V ); stars with M AS S mag > 3.2 were removed. ... This was made based on the GCVS4.2 catalogue data. ...

... В разделе По форуму . ... На форуме начался конкурс - Астрофотография месяца: АПРЕЛЬ! ... Форум . ... Дополнительные форумы ? Горизонты науки о Вселенной (Модераторы: Дмитрий Вибе , AlAn ) . Обсуждаем проблемы современной астрономии, астрофизики и смежных наук. ... Тема / Автор . Ответов / Просмотров . Последний ответ . ... Автор Дмитрий Вибе . 16 Ответов . 418 Просмотров . ... Автор Сергей Попов ? ... 5 102 Просмотров . ... О разделе Горизонты науки о Вселенной. ... Автор Ах . ...

HIGH RESOLUTION IONOSPHERIC MASS SPECTROMETER P-11 . ... Onboard mass-spectrometric equipment for study of neutral and ionized components of Earth upper atmosphere. Mass-spectrometer P-11 is one of P-series modifications of the on board radio-frequency monopole spectrometers. ... The instruments of P-series have passed successful approbation in space experiments aboard geophysical rockets MP-12, launched for investigation of Earth upper atmosphere (Ref. ... Measured mass number range, AMU - 1.. ...

General Information . ... The conference is organized by the Sternberg Astronomical Institute (SAI) of Moscow University and the IAU Working group "Site-testing Instruments" . ... Use of site data in telescope operation and adaptive optics. ... Recent conferences on this subject (2007, 2008) demonstrated great interest of the community, hence the need for a new meeting. ... Unlike previous recent conferences, this meeting will cover all aspects of site monitoring for optical/IR astronomy. ...

... We present a pro ject of an Information system on binary stars (ISBS). ... Stars from the following catalogues will be included in the first version of ISBS: Catalog of orbital elements , masses and luminosities of close double stars ( Svechnikov Bessonova 1984); The catalogue of approximate photometric and absolute elements of eclipsing variable stars ( Svechnikov Kuznetsova 1990); The catalogue of orbital elements , masses and luminosities of detached main-sequence ...