As always, Google is your friend. serach for "telescope camera adaptor" or "astrophotography". Before purchasing a telescope, figure out what type of scope you need. For instance, a Dobsonian scope is great for astronomical items, while a Cassegrain will be able to do that, plus terrestrial objects as well. You can read more about these at
http://www.telescope.com, which is the website for Orion telescopes.