... 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. ...

The silicates that produce the 10 and 18 micron features appear to be broadly similar to terrestrial minerals such as Forsterite and Enstatite. ... Where pre-solar silicate dust grains can be isolated from meteorite material, these also tend to be Mg-rich silicates rather than Fe-rich silicates. ... It has been suggested that the interstellar silicate grains have a different 10 micron feature profile than what is observed for the silicates around evolved stars. ...

... This artist's concept shows a lump of material in a swirling, planet- . ... Astronomers have witnessed odd behavior around a young star. Something, perhaps another star or a planet, appears to be pushing a clump of planet-forming material around. ... Spitzer observed infrared light coming from one such disk around a young star, called LRLL 31, over a period of five months. ... could be shoving planet-forming material together, causing its thickness to vary as it spins around the star. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2001 December 25 . Star Forming Region Hubble-V . ... Hubble Heritage Team , NASA . ... Inspection of NGC 6822 shows several bright star groups, including two dubbed Hubble-X and Hubble-V. Pictured above , the Hubble Space Telescope has resolved Hubble V into the energetic stars that are lighting up the surrounding gas. ... About APOD | ...

... Why would a cloud appear to be different colors? A relatively rare phenomenon known as iridescent clouds can show unusual colors vividly or a whole spectrum of colors simultaneously. ... Journey to the Center of the Galaxy . ... NGC 4565: Galaxy on the Edge . ... Magnificent spiral galaxy NGC 4565 is viewed edge-on from planet Earth. ... Unusual Spiral Galaxy M66 . ... Usually density waves of gas, dust, and newly formed stars circle a spiral galaxy's center and create a nearly symmetric galaxy. ...

... It is possible to change the meaning of keywords (to `overload' them), but it can be confusing, primarily because your new commands may not behave the same way that this manual claims. ... If you said box in your macro, then overloaded the keyword, you'd have a macro that called itself. ... Another example is that (when overloaded) lines saves the line numbers used, so that you can write a macro to print the top 10 lines of a file (it's called head ). ...

... Instead, new evidence obtained using the UK's Infrared Telescope (UKIRT) in Hawaii, spins a different story. Streams of spinning bullets have been discovered. These infrared bullets, moving at prodigious speeds, deposit the spin far away from the birth region'' , stated Armagh Observatory astronomer Dr. Michael Smith. ... Now, using the UK Infrared telescope in Hawaii fitted with sensitive instruments, a team of astronomers have found evidence that the jets of bullets are spinning. ...

OptInt PmWiki : Pm Wiki / Forms . ... Forms processing can be found in the Cookbook (see below). ... input text name value size= n :) (:input hidden name value :) (:input password name value :) (:input radio name value :) (:input checkbox name value :) (:input select name value label :) (:input default default-name default-value :) (:input submit name value :) (:input textarea name [=value=] rows= n cols= n :) (:input reset name label :) (:input file name label :) (:input image name "src" alt :) . ...

... 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. ...

... Content Model: PCDATA (i.e. text and entities) . To let users enter more than one line of text, use the TEXTAREA element. ... The text up to the end tag is used to initialize the field's value. ... User agents should tolerate the same range of line terminators within the initialization text. In a typical rendering, the ROWS and COLS attributes determine the visible dimension of the field in characters. ... User agents should allow text to grow beyond these limits by scrolling as needed. ...

... Nebulae are clouds of gas and dust in space. ... These clouds come in many different varieties: some are the remains of dead stars, while others are areas of vigorous star birth, like this one. In fact, two different types can be seen in this striking new image: emission nebulae and reflection nebulae. ... The bluish patch next to the red emission nebula shows light from recently formed stars being scattered in other words, reflected in many different directions by these tiny particles. ...

... Moon Phase below . ... ARTICLE: Why the moon always shows us the same face . ... Before you continue reading, you should know that this was not always the case, i.e. the Moon once was rotating with respect to the Earth, so that on every night a terrestrial observer (if there was one, because this was long, long before mankind appeared on our planet, and even before any major animals had appeared) saw another face of the Moon. ... Figure 1 (not to scale) shows how we can imagine the system Earth-Moon...

... self-absorption - the absorption of light shining on an object by a process similar to that which produced the light originally; if a cloud emits less light than it absorbs from other clouds behind it, this net loss of light, termed self-absorption , causes the foreground cloud to appear darker than the background field (the term is from spectroscopy, where small absorption dips sometimes occur in larger emission lines, making the latter look as if it is absorbing part of itself) . ... HISA Main ...

Welcome to the Everyday Classroom Tools curriculum, Observing the World Around Us, which takes its form in The Threads of Inquiry. Before you begin, you will probably like to know how to use the Threads, what they will look like, and what resources are contained in their text. ... It pinpoints the scientific motivations for this Thread, or why it is important for students to understand what is happening around them with regards to the Thread topic. ... the Threads, and additional button . ...

... The larger image shows the entire nebula; the inset picture captures the complicated structure surrounding the dying star. The remarkable features of this nebula are the numerous holes in the inner shells with jets of material streaming from them. ... The multiple shells of material ejected by the dying star give this planetary nebula its odd form. ... At least four jets of material can be seen in the "full nebula" image: a pair near 6 and 12 o'clock and another near 2 and 8 o'clock. ...

... Registration Form . Please complete and return this form (even if you sent the pre-registration form) . ... Odessa Astronomical observatory Telefax : 380 482 229442 . Park Shevchenko E-mail : astro@te.net.ua 270014, Odessa-14 (Ukraine) . NAME (to appear in the badge) :.. ... LaTeX template . ... begin{document} . begin{center} . ... end{center} . ... please insert a figure, if needed. % please name Your files as "Your_name1.pcx" rather than "Odessa1.pcx" . ... begin{figure}[h] . ...

Next: About this document . Simple Model Of Accretion Onto Isolated Neutron Star With Synchrotron Cooling . ... In this work we modeled accretion onto the isolated neutron star (INS) from the interstellar medium in the case of spherical symmetry for different values of the magnetic field strength, ambient gas density and NS's mass. ... 1993 A&A 269, 319, hereafter CTL). Dependence of from t in our model coincides well with the analytic formula from CTL. ... About this document .. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . ... Stars . ... Space Flight . ... A galaxy is born: This artist's impression shows a young galaxy, about two billion years after the Big Bang, accreting material from the surrounding hydrogen and helium gas and forming many young stars. ... Galaxies, distant from us in space and time, have been in the news recently. ... Astronomers at the European Southern Observatory have observed another process which helped primordial galaxies grow. ...

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. Aurorae form in high latitude regions of Earth, and appear in many different shapes. The aurora in the early evening sky forms a green arc that stretches across the sky in an east-west direction. Dan Wilkinson