It is highly recommended that you use a
video display resolution of at least 1024x768 (you should be
able to enlarge your browser window until there is no horizontal
scroll bar at the bottom).
You should also use a video display that
supports at least 256 colors (8-bit video). Video displays of
thousands (16-bit high-color) or millions (24-bit true-color) of
colors are highly recommended --astronomical images can be very
colorful!