The Oxford Dictionary of Astronomy is a must-have for any astronomy enthusiast or student. This second edition, developed by Mobile Systems, offers over 4,300 up-to-date entries covering all aspects of astronomy. Compiled by a team of expert contributors under the editorship of renowned author and broadcaster Ian Ridpath, this dictionary covers a wide range of topics, from space exploration and astrophysics to cosmology and the concept of time.

The entries in the dictionary have been thoroughly revised and updated for this edition, and new entries have been added to reflect the recent developments in the field of astronomy. From magnetic reconnection to Fornax cluster, luminosity density to Akatsuki, this dictionary provides comprehensive and accurate information on the latest discoveries and concepts in astronomy.

In addition to the extensive entries, the dictionary also includes biographical information on eminent astronomers, as well as coverage of observatories and telescopes from around the world. The appendices feature useful supplementary material, such as tables of Apollo lunar landing missions, constellations, and planetary data.

The Oxford Dictionary of Astronomy now comes with a convenient Home page and a sleeker visual layout, making it easier than ever to navigate and find the information you need. The advanced search tools, including search autocomplete, keyword lookup, and camera search, further enhance the user experience. The learning tools, such as the 'Favorites' feature, 'Recent' list, and 'Word of the day' section, allow users to expand their vocabulary and deepen their understanding of astronomy.

Please note that this is a fully functional 30-day trial version. To unlock the complete features list, including offline mode, premium support, and an ad-free experience, users can purchase the full version of the Oxford Dictionary of Astronomy.