3.12. Data

The very useful Handbook of Space Astronomy and Astrophysics by M.V. Zombeck is available on-line thanks to Cambridge University Press. (http://adswww.harvard.edu/books/hsaa/idx.html).

Other useful information on astrophysical objects is stored at the CDS website (http://cdsweb.u-strasbg.fr/data-online.html).