The Hipparcos web site is designed to be a useful resource for professional and amateur astronomers. In addition to providing online access to the Hipparcos and Tycho Catalogues and selected annexes, you will also find up-to-date preprint and journal papers, educational applications and general Hipparcos related presentation material. (The Hipparcos Home Page is accessible by clicking on the image of the satellite above.)

If you are not familiar with the web site, follow the menu above which will lead you to some details on this site which we think should not be missed, and which are included here to give you an idea of the information contained on this site.

In addition to the tools and resources which can be accessed from the web pages, there are also helpdesk and feedback facilities for queries which are not addressed by the web content.