A Hole in Mars . ... Credit Copyright: NASA , JPL , U. Arizona Explanation: What created this unusual hole in Mars? The hole was discovered by chance on images of the dusty slopes of Mars' Pavonis Mons volcano taken by the HiRISE instrument aboard the robotic Mars Reconnaissance Orbiter currently circling Mars. ... Analysis of this and follow-up images revealed the opening to be about 35 meters across, while the interior shadow angle indicates that the underlying cavern is roughly 20 meters deep. ...

... From Mark Bailey, Armagh Observatory, and Greer Ramsey, Armagh County Museum . The National Museums Northern Ireland and the Armagh Observatory announce the launch of the exhibition "Portraits of Astronomers", at 8.00pm on Thursday 19th November at Armagh County Museum . ... Among the invited guests will be Lucinda Douglas-Menzies who took the images and whose book and exhibition is a fitting tribute to the United Nations International Year of Astronomy 2009. ... Thursday, 12 November 2009 00:16 . ...

... This appendix describes how to use the JavaScript console to evaluate expressions and display error messages to the user. ... Displaying Error Messages with the Console JavaScript 1.2 and earlier versions. ... You can specify whether to automatically open the console when a JavaScript error occurs or to display a dialog box for each JavaScript error. ... To open a dialog box each time an error occurs, add the following line to prefs.js : user_pref("javascript.classic.error_alerts", true); . ...

... Astrophysics Group . ... Opening of Battcock Centre for Experimental Astrophysics . ... SKA AAVS0 array . ... SKA production design with Cambridge Consultants Ltd . ... Astronomy, Astrophysics and Cosmology have historically been among the very strongest scientific disciplines in Cambridge. ... Paul Alexander, Head of the Cavendish Astrophysics Group and Director of the Battcock Centre for Experimental Astrophysics, is the leader of CambridgeБЂ™s involvement in the SKA: . ...

... 2004 March 31 . M39: Open Cluster in Cygnus . ... Spanning an angle larger than the Moon , M39's relatively few stars lie only about 800 light years distant toward the constellation of Cygnus . ... Open clusters, also called galactic clusters , contain fewer and younger stars than globular clusters . Also unlike globular clusters, open clusters are generally confined to the plane of our Galaxy . ... About APOD | ... NASA Web Site Statements, Warnings, and Disclaimers . ...

... 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 | ...

... Invoking a CGI Program . ... To open a document in your browser, use a URL that specifies an absolute or relative location for the document. An absolute location has the form: . ... To open a local file in your web browser, use a URL that has the form: . ... mailto: address For example: . ... http://hoohoo.ncsa.uiuc.edu:80/cgi/overview.html To specify a URL that invokes a CGI program, specify the location of the CGI program, followed by a query string which contains the arguments for the program. ...