HST previews are not currently working. We are investigating and apologize for the inconvenience.
For image previews we suggest that you try the Aladin option, and for spectral previews the SpecView option. Links to these options are found near the bottom of the preview page.
For ACS, STIS and NICMOS grism data you may find the HLA another good option.
MAST Web Tutorial
The MAST GALEX team provides separate tutorials for the GALEX web site.
While the GALEX site and interface have many things in common with the rest of MAST,
there are some differences due to a difference in servers and software.
This tutorial currently does not contain information about the Guide Star Catalog (GSC) interfaces and
data. Please see the GSC web pages for additional information.