Hi & welcome Eeda,
The eyepieces will give different magnifications.
Here's a site that gives you the low-down.
>
http://www.twcac.org/Tutorials/magni...n%20Calculator
&, not knowing your level of expertise, may I also suggest this site.
>
http://www.astronomyforbeginners.com/
Plus, this site has heaps of links at the top LHS to lots of helpful articles etc.
viz; >
http://www.iceinspace.com.au/projects.html