These are several research papers on different astrophysical topics
which I think are highly informative and very well written.
Those are not only interesting for scientist,
at least in my opinion,
but for every person scientifically interested (as long as you are
willing to put some effort into understanding them).
Here I present a highly incomplete and non-representative selection of those papers. Please be aware that the line of description before the link to the article is not the title of the paper. It is my one line summary on what this paper is about in my opinion.
Good search sites for astrophysical papers are:
Great online databases on extrasolar planets are: