The source of the first image is from wikipedia.org and Hannes Pieterse of Bloemfontein/South Africa graciously granted permission to have two photos posted (latter two). Check out http://www.assabfn.co.za for further images. Some photos may also be viewed at http://www.astropix.za.net .
For further information and images of Comet McNaught plus other comets go to the following links:
Or you may try various search engines, such as Dogpile, Google, Lycos and Yahoo, and see what results are achieved. You will find the above mentioned links and others.
The last comet I saw was Comet Hale-Bopp in 1997 when I was living and working in Toronto. I remember seeing it in the evening after sunset and again in the morning. Even the city lights where I worked did not blot it out.
For information on planets, stars, and so on, try http://www.solstation.com/stars.htm . I am sure there are many other possibilities. Even for those that do not have a camera, there is nothing that a computer and an internet connection can not solve. Good luck with your research and viewing.