Shadow Cone of a Total Solar Eclipse . ... Credit Copyright: Oliver Staiger ( High Moon ) Explanation: Sometimes, during a total eclipse of the Sun, a strange shadow of darkness can be seen stretching off into the distance. Called a shadow cone, they are visible because the Earth's atmosphere is not completely transparent, scattering sunlight and hence appearing blue during the day. ... Visible above is a shadow cone caught during a total solar eclipse visible last month from South Australia . ...

... 2007 March 27 . Enceladus Creates Saturn's E Ring . ... Explanation: The active moon Enceladus appears to be making Saturn's E ring. An amazing picture showing the moon at work was taken late last year by the Saturn-orbiting Cassini spacecraft and is shown above . Enceladus is the dark spot inside the bright flare, right near the center of Saturn's E ring . ... The above bright image of the normally faint E-ring was made possible by aligning Cassini so that Saturn blocked the Sun. ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Next: Third: Create a session Up: Starting up correlator control Previous: First: Log on to б  Contents . Both the correlator interface and the correlator spectra display program are run from lbaccc . ... lbaccc . ... A more complete explanation of SPD, including available commands, is found in Appendix C. Next: Third: Create a session Up: Starting up correlator control Previous: First: Log on to б  Contents . ...

... 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 Sun's corona . ... For instance, short "plumes" rising from the polar regions of the Sun look very much like field lines coming out of the end of a bar magnet, and they therefore suggest that the Sun, in addition to the intense fields of sunspots, also has a global magnetic field like the Earth's. Arches above the . Sun's surface . ... It is brightest near sunspots, whose arched field lines apparently hamper the outflow of solar wind which carries away energy and helps cool the corona. ...

... Behemoth black hole found in an unlikely place . ... Astronomers create movie of M87's jet . The movie, created from more than 13 years of Hubble observations, promises to give scientists a better understanding of how black holes shape galaxy evolution. ... Astronomers have assembled, from more than 13 years of observations from NASA s Hubble Space Telescope, a series of time-lapse movies showing a jet of superheated gas 5,000 light-years long as it is ejected from a supermassive black hole. ...

... Just to learn how to generate a system call, I created a simple system call that basically sets and resets the value of a global parameter "PREFETCH". SYSTEM CALL code ********************************** int PREFETCH = 0; /* this is a global variable */ . ... To execute the sys_prefetch system call, I wrote a prefetch.c file with the following code. ************************code to call sys_prefetch***************** #include <linux/unistd.h> _syscall2 (int, prefetch, int, mode, int, nr_hints) . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Armagh Observatory reports that, if skies are clear on the night of 27/28 September, skywatchers will witness a rare total eclipse of the Moon during the early hours of Monday 28th. ... As the eclipse progresses from penumbral to partial phase, and then towards totality, it is interesting to observe how the dark shadow of the Earth slowly encroaches on the Full Moon until the Moon is nearly completely obscured. ...

... This paper describes the main algorithms used by the Einstein Level One processing to create the exposure masks and the background maps for Einstein IPC images, and how these algorithms were recreated in the IRAF environment. Our goal was to recreate the algorithms used by the Level One Proc