... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

... Messier 6 and Comet Siding Spring . ... Credit Copyright: Rolando Ligustri ( CARA Project , CAST ) Explanation: This looks like a near miss but the greenish coma and tail of Comet Siding Spring (C/2013 A1) are really 2,000 light-years or so away from the stars of open cluster Messier 6 . They do appear close together though, along the same line-of-sight in this gorgeous October 9th skyscape toward the constellation Scorpius . ... October . ... October 2014 . ... Publications with keywords: comet . ...

. ___________________________________________________________________ The Electronic Universe Project e-mail: nuts@moo.uoregon.edu

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2003 September 2 . Contemplating Mars . ... Thousands of people the world over lined up last week to see Mars through a telescope as the red planet and Earth passed unusually close together in their orbits around the Sun. Reviews of Mars were mixed, with some people disappointed that Mars still appeared somewhat blurry . ... About APOD | ...

Astronotes Armagh Planetarium's Stellar Blog! ... Earth Satellites . ... Continue Reading.. ... 2 Comments The space programmes of the USA and USSR began in a spirit of bitter Cold War rivalry but by the early 1970s internation tensions had eased a little into a [ ] . ... Posted on June 20, 2014 | ... 2 Comments The year 2014 could see the first 3D printer brought into space, the first fare-paying passengers leave Planet Earth on the Virgin Galactic and the first test mission of a [ ] . ...

... Tonight's Sky . ... Observing . ... Sky this Month . ... Astronomy for Kids . ... Can you explain Mercury's retrograde motion? Do other planets appear to do this also? ... When astronomers talk about retrograde motion, generally they refer to the apparent motion outer planets make as Earth passes them while orbiting the Sun. ... 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 Discussion Forums . ... Not Really . ... Posted by Harvey on October 28, 2002 05:34:32 UTC . ... Trudging through murky waters - harvey1 - October 30, 2002 - 15:30 UTC . What are you afraid of? - doctordick - November 1, 2002 - 02:34 UTC . Nothing psychological here - harvey1 - November 1, 2002 - 19:32 UTC . ... Chuckle (nt) - harvey1 - November 1, 2002 - 21:59 UTC . Dick is in serious need of rewording - harvey1 - November 1, 2002 - 22:03 UTC . ... www.astronomy.net . ...

... There has been a heated public discussion in the past few years about whether our ninth planet is really deserving of the name. Since Pluto orbits a star, and is much less luminous, it certainly satisfies the definition we have above. The problem is actually not with Pluto, but with a very large number of other bodies in our Solar System which also satisfy this definition, but which are not called planets. Perhaps the most notable of these is Ceres, the largest asteroid. ... Planet . ...

... October 4, 1995 . The Sun Spews X-rays . Credit: Yohkoh Soft X-ray Telescope , ISAS , Japan . Explanation: Our Sun is really very hot. The Sun's outer atmosphere is so hot that it emits much light in the X-ray band, which was unexpected. X-rays are usually emitted from objects having a temperature in the millions of degrees, not the mere thousands of degrees of the Sun's surface. The above X-ray picture shows the Sun one particularly active day in August of 1992. ...

... Deutsch . ... The Milky Way is the galaxy in which we live, a collection of billions of hot burning stars, planets and cosmic gas. If you re lucky enough to have enjoyed a really dark sky, far from the light pollution in cities and towns, you might have seen the Milky Way arching majestically across the night sky. ... This star cluster lies in the Carina-Sagittarius arm, named after the two constellations we find it in (the Carina constellation and the Sagittarius constellation). ...

Targeted searches Slow transients Fast transients Really fast transients Technical considerations Transients with Parkes What it's good at, and how to make it better Justin Bray 29 October, 2012 Targeted searches Slow transients Fast transients Really fast transients Technical considerations Contents Targeted ... Need real-time processing. stored buffer Different from pulsar searches. ... Parkes is better at fast transients. ...

... The package includes a new ``hybrid'' symplectic integrator capable of handling close encounters, described at the conference: The Impact of Modern Dynamics in Astronomy , Namur, Belgium (Chambers 1998). ... NRC Research Associate, NASA/Ames Research Center , Moffett Field CA, USA, planetary accretion, formation of the asteroid belt and extra-solar planets. ... G.Laughlin and J.E.Chambers (2002) Astronomical Journal, , in press. ... American Astron. ... Home page of planet hunters Marcy and Butler ....

... We have measured this "redshift" for the pink black holes, and allowed for it in our calculations. ... We see this effect in the emission from gas around these pink black holes, but it is far too small an effect to account for the pinkness. Thus the swirling motions of gas around or into the black holes cannot produc the colour. ... At first we thought that these things were normal blue black holes hidden behind clouds of interstellar dust, that absorbed the blue light and made them appear pink. ...

... Missions . HST . ... Research . ... The key questions I would like addressed in my section include: 1) What are the remaining plausible models that explain the faint blue counts in both the field and cluster and are dwarfs necessary in these models? How much evolution is actually needed? ... 2) Showing some Keck redshift and kinematic data of very faint blue galaxies, as well as complementary HST structure and morphology that address the issue of faint blue galaxies being dwarfs. ...

... Typed by Suedehead (skrajew@augsburg.edu) 'Steven (You Don't Eat Meat)' You said you came in off the street King of the promised land You offered me your heart I took your hand Now you go towards Albana To challenge our destiny How we tried You don't eat meat But you eat your heart out, Steven It's time to get even I'll make it up to you I'll go, I'll try With you in mind Oh Steven You dressed me in my [?? ... I'm sure all you clever swines can guess who Steven is. ...

... The IB_MAG5 magnetic conjugations with the others Spacecraft . ... ASCII file description | Plot description | ... ASCII file | real time plot . ... The IB_MAG5 magnetic conjugations with the groundbased magnetic observatories . ... The magnetic mapping polar diagram, and ASCII files for each decade of month: . ... ASCII files description | Back to the IB_MAG5 Home page. Updated 19 October, 1999 . ...

This is a new popup window - close it when you are done . Submitted by Robert Halstead on 06/30/2015 23:19:35 . Planets Passing in the Night, June 30, 2015 . ... Captured using my Canon 6D at the prime focus of my 8-inch f/10 Celestron Schmidt-Cassegrain telescope. ISO 1600, 0.6 seconds for the image at the left; and ISO 400, 1/50 second for the image at the right. Images captured between 8:57 and 9:02 pm EDT on June 30, 2015. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Laboratory of Real Structure of Crystals . ... Fields of research . Experimental techniques . ... Photoelasticity method for study of microstress fields around individual dislocations (and their clusters) and their influence on physical properties of crystals. ... Two-level periodic pulse loading technique for study of characteristics of the kink pair formation and motion along dislocation lines in different types of crystals. ISSP RAS © 2006 All rights reserved ...

... 8, ``Celestial Mechanics'', 2002 Connection between apparent and real orbits of a binary system P. Descamps Institut de M'ecanique C'eleste et de Calcul des ' Eph'em'erides, Paris, France In a binary system, each body describes about the other an elliptical apparent orbit which is the projection of the real orbit on the tangential plane. ... 0.5 0.0 0.5 Dacosd (arcsec) ­0.5 0.0 0.5 Dd (arcsec) E N W ­0.5 0.0 0.5 Dacosd (arcsec) ­0.5 0.0 0.5 Dd (arcsec) E N W October 2001 November 2001 Fig. ...

. XMM-Newton Science Analysis System . ssclib (ssclib-3.24) [xmmsas_20050815_1803-6.5.0] . Meta Index / Home Page / General-purpose array-processing utilities . Subsections . 1-D interpolation . Trapezoid-rule, 1-D, numerical integral . Median . Value at histogram fraction . XMM-Newton SOC/SSC -- 2005-08-15