We present new images of the reflection nebula surrounding the R Coronae Borealis Star, UW Centauri. ... Instead, the morphology of the nebula appears to change as different parts are illuminated by light from the central star that is modulated by shifting thick dust clouds near its surface. ... In this way, the central star acts like a lighthouse shining through holes in the dust clouds and lighting up different portions of the nebula. ... ADS Citation Query . citations = 21 . ...

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The Australian Academy of Science is releasing The science of climate change: questions and answers and it is must reading no matter what your view is of Global Warming. It is a consensus overview by Australia's most expert climate scientists, overseen by the Academy, to explain what we know, and we do not know about anthropogenic climate change, and how we might mediate future changes. ... However, my own scientific opinions in my areas of expertise are consistent with their conclusions. ...

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... I normally begin by asking the class what they think would be different if the Moon didn't exist, or if the Sun were closer to Earth, or if a star exploded nearby. ... The winds would be much stronger. ... In using what-if questions in the classroom, it is worth bearing in mind that students extrapolating the effects of new scenarios will encounter two different situations: direct changes to the new version of Earth and indirect changes resulting from the direct changes. ...

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... The Seasons . ... Section #1 Stargazers and Skywatchers described the observed motion of the Sun across the sky, in different seasons of the year. ... If the Earth's axis were perpendicular to the ecliptic, as in the drawings here, the Sun's position in the sky would be halfway between the celestial poles, and its daily path, seen from any point on Earth, would stay exactly the same, day after day. Each point on Earth would be carried around the axis AB once a day. ... The Sun and Seasons . ...

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... With enough velocity, a spacecraft can break loose from the Earth's gravity and enter an orbit around the Sun, like that of a planet. If it then orbits the Sun with the same period as the Earth--one year--it may keep a fixed position relative to Earth. ... If the distance is just right--about 4 times the distance to the Moon or 1/100 the distance to the Sun--the spacecraft, too, will need just one year to go around the Sun, and will keep its position between the Sun and the Earth. ...

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... 24sep08: long recovery vs alfa rotation angle. ... On 23sep08 around 14:00 hours data was taken with alfa on the sky to see how long the recovery took. ... 2 172 MHz Bands per beam . ... On 24sep08 around 17:00 data was taken with alfa and the pdev spectrometer to measure the long recovery time versus the rotation angle of alfa. ... As alfa rotates, different beams have larger/smaller recovery times. ... This is the same data as the total power plots above. beam 0 alfa rotation= 0 deg . ... page up ...

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OptInt PmWiki : Pm Wiki / Mailing Lists . ... pmwiki-users ] . ... http://pmichaud.com/pipermail/pmwiki-users/ . ... If you address a reply to a single list member, please take the [pmwiki-users] off the subject line, or it's possible for your message to get lost in the mailing list traffic. ... First go to http://pmichaud.com/mailman/listinfo/pmwiki-users and enter your e-mail address in the field at the bottom of the page, to the left of the button Unsubscribe or edit options . ...

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... Archives . ... Quote] Model Skeptics . ... From IMS Bulletin Vol. 36(7) p.10, TerenceтАЩs Stuff: Changing my mind (again) . Over the years IтАЩve had many strong likes and dislikes for the various parts our subject. ... IтАЩve been in love with sufficiency and hated cluster analysis. I thought the theory of games was elegant, while that of linear models lacked style. ... Brownian theory was hot, sampling theory was not. ... Comment ( RSS ) | ... Entries RSS . ... Chandra Blog . ML Theory . ...

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... Bad Astronomy . ... I think I will break from my usual format of Bad Astronomy/ Good Astronomy by saying that the way we define seasons currently is not strictly bad, but I feel (in my opinion!) that it could be better. The definition of when the seasons begin is at the moment of solstice or equinox; that is, winter (in the north) starts on December 22 nd and summer starts on June 22 nd . ... Now imagine breaking up the Sun's 46 degree up-and-down yearly swing into 1 day intervals. ...

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• Phil Plait's Bad Astronomy: Bitesize Astronomy

... 2003 July 23 . GRACE Maps the Gravity of Earth . Credit: GeoForschungsZentrum Potsdam , CSR U. Texas , JPL , NASA . ... To help better understand the Earth's surface , slight distance changes between a pair of identically orbiting satellites named GRACE have been used to create the best ever map of Earth's gravitational field . ... Maps like this also help calibrate changes in the Earth's surface including variable ocean currents and the melting of glaciers . ... About APOD | ...

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• APOD: 2014 March 12 - The Sun Rotating
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. There are several ways in which you can change the structure and the content of the file you are editing. Repeat parts of the text . Insert the contents of another file . Cut and paste text .

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• Changing default access permissions
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... Star Atlas . ... Gaseous ring around young star raises questions . ... Astronomers have detected a mysterious ring of carbon monoxide gas around the young star V1052 Cen, which is about 700 light-years away in the southern constellation Centaurus. ... This new finding raises more questions than it answers about the late stages of star and solar system formation. т??Why do turbulent motions not tear the ring apart?т?? ... Only registered members of Astronomy.com are allowed to comment on this article...

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... PmWiki . ... Mailing Lists . ... Go to new wiki . ... pmwiki-users ] . ... http://pmichaud.com/pipermail/pmwiki-users/ . ... If you address a reply to a single list member, please take the [pmwiki-users] off the subject line, or it's possible for your message to get lost in the mailing list traffic. ... First go to http://pmichaud.com/mailman/listinfo/pmwiki-users and enter your e-mail address in the field at the bottom of the page, to the left of the button Unsubscribe or edit options . ...

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• Mode changing, Srifting and Nulling
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. Sitemap . Contact . Search . Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . by . Enric Pall . Big Bear Solar Observatory . A colloquium presented at Armagh Observatory on 2006 February 1st. The slides from this presentation are available in the following formats. HTML in your browser . PDF file - 14MB . Quicktime movie - 9MB . Macromedia Flash - 9.7MB . MS Powerpoint - 12MB . Last Revised: 2009 December 17th .

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Next: Special Cases: Supernova Explosion Up: Change of Binary Parameters: Previous: Mass change . The binary separation a changes differently depending on the mass exchange mode. ... If the mass transfer is conservative ( , i.e. const) and one may neglect the redistribution of the intrinsic angular momenta of the components, the total orbital momentum conservation law implies . ... the orbital separation always increases in such systems). ...

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• Introduction
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... Great oppositions. ... Proxima Centauri. ... Scientists proved that the problem of preserving the Earth's climate and the annual change of seasons can be solved by a small star, negligible mass, but similar to a main-sequence star, moving in a circular orbit around the Sun. ... Sombrero Galaxy. The Sombrero Galaxy, M104, is known as a holder of one of supermassive black holes. ... Roughly estimate the approximate mass of the supermassive black hole in the center of M104 (answer in solar masses m). ...

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• Rules and regulations for a participant
• International Astronomy Olympiad: Rules and Regulations for a participant (in

.

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• Stars and Galaxies
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... What is the notion time? ... Generally speaking, it is an order of changing events, an order of constantly changing conditions of solids, Universe - being. ... The time, determined for the given longitude, is called the local time . ... A uniform system of time counting - ephemeris time is tested by observations of the Moon turning around the Earth. Fully independent from astronomic observation uniform system of the time counting is based on the concept of atomic second (see quantum watches ). ...

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. XMM-Newton Science Analysis System . sas (gui-1.52.8) [xmmsas_20080701_1801-8.0.0] . Meta Index / Home Page / Reference documentation You can alter the look and feel of the GUI by changing the used fonts or using a different style for the buttons, menus etc... Subsections . Supported styles . Supported fonts . XMM-Newton SOC/SSC -- 2008-07-01

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• Change history
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... Re : How can I "cheat" and change the IP address (src,dest) in the sent socket? ... Keywords: ip firewall router socket network address . ... If you change your IP address on your client's socket to an "anonymous" IP address (one on a different physical subnet than your own assigned address), you will not be able to receive replies sent to that IP address unless you also manipulate the routing tables of all of the routers between the IRC server and your "anonymous" client. ...

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