Nikon D90 Astrography? - 1

I have a Nikon D90 with a few lenses (18-105 f3.5/5.6, 70-300 f4/5.6, 35 f1.8). I would like to be able to take a picture of a galaxy, say andromeda or something, but I'd prefer to use just a tripod. Is this possible? How do I do it? What exposure settings should I use?

I think you should go with 62" Inch Professional Tripod

Extends to 62 Inches Tall, Folds to 24 Inches, Weighs Just Over One Pound!
8-Pound Load Capacity
3-Way, 360-Degree Swivel Panhead
Adjustable Tilt and Pan Controls
Includes Nylon Carrying Case with Shoulder Strap