Celestia is a real-time visual space simulation astronomy program. It is a cross platform, open source software and released under the GNU General Public License. NASA and ESA have used Celestia in their educational and for interfacing to trajectory analysis software. It allows users to travel through an extensive universe, modeled after reality, at any speed, in any direction and at any time in history. Celestia displays and interacts with objects ranging in scale from artificial satellites to entire galaxies in three dimensions using OpenGL. It is a perfect software for astronomer, educator, student, and teacher for astronomy purpose.
I’ve been working on the Linux Shell Scripting Tutorial v.2.0 for some time and now the updated version licensed under “Creative Commons Attribution Noncommercial Share Alike 3.0 Unported” of the same available in wiki format. It will contain a few significant changes from the previous versions of the tutorial, which includes a new topics, grammar & typo fixing and new sys admin related scripts.
Our FAQ section is updated in last few days with new howtos:
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Red Hat Enterprise Linux v5.4 has been released and available via RHN for immediate update. The new version includes the kernel-based virtual machine (KVM) virtualization, next generation of developer features and tools including GCC 4.4, a new malloc(). Also included clustered, high-availability filesystem to support Microsoft Windows storage needs on Red Hat Enterprise Linux.