This database provides access to IDOC catalogues and complementary information on clusters of galaxies observed through the Sunyaev-Zeldovich (SZ) effect.
The high sensitivity and angular resolution of the 2MASS Large Galaxy Atlas (LGA) images allows closer inspection of diverse stellar populations, large-scale structures such as spirals, bulges, warps and bars, star formation regions and evolution of galaxies. This image atlas represents the first uniform, all-sky, view of galaxies as seen in the near-infrared wavelength window that is most sensitive to the dominant mass component of galaxies.
The Astrophysics Data System (ADS) provides access to the astronomical literature. It is funded by NASA and hosted at the Harvard- Smithsonian Center for Astrophysics. It consists of two main parts. The abstract service allows you to search the tables of contents and abstracts of essentially the whole astronomical literature. The article service contains the scanned full articles of a large part of the astronomical literature. Access to the ADS is free to anybody world-wide.