Service Outage
On Saturday, July 27, from 11:00 to 21:00 UTC (7 am to 5 pm US Eastern Time), all MAST services will be unavailable due to maintenance.
The default size of DSS images is 15 x 15 arcminutes.
How big a file this makes depends on the survey and the file format
you've selected. FITS images for the First Generation surveys are
about 0.5 megabytes, while GIFs will typically be less than
half that size, and JPEGs smaller still, at a few tens of
kilobytes.