Opening a new window from a link with target=_blank

I recently put up a page and had several links taking users out of my site
so I decided to use the following to have the new site open in a separate
window:
<A HREF="http://xxxx.com" target="_blank">

Here's the page:
http://jsjbf.com/greatadventureindex.html

What I didn't like about the result is that:
a) when the new window opens it is so large that nearly covers up my page
making it hard for the user to see that they have not really left the site.
b) As a result, I myself kept clicking on the back button to get out of it
only to find that it would keep bringing me back to the same spot.
c)  I found this more confusing and annoying than helpful.

Is there a way to control the size of the new window so that the user can
still see a substantial part of the originating page and not get confused as
to where they are? Thanks for your ideas.
Kate Pollara

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