This is a clever program that'd be really handy if you're into astromony as well as have an ST. Equatorial Atlas is a sky mapping program which displays the night sky as you can see it from either the northern hemisphere and the equator, and works in medium resolution. All 43 major constellations in the northern and equatorial sky are covered in the full version, along with about 1,600 individual objects.

Once you're viewing a constallation, you can select individual objects - the name of the star or galaxy is displayed at the bottom of the screen along with any interesting information. The cut down version gives you access to two-thirds of the constellations if you have a 1040 and one third of them if you have a 520.

For the full program, you need 1MByte of RAM. It's £5 to register for the full version, so get writing those cheques!