This article is from the Astronomy FAQ, by Joseph Lazio (jlazio@patriot.net) with numerous contributions by others.
By needed
Yes!
This is an active area of research, and since 1992 astronomers have
found planets around two pulsars (PSR 1257+12 and 0329+54) and about a
half-dozen main-sequence stars.
See
<URL:http://cannon.sfsu.edu/~gmarcy/planetsearch/planetsearch.html>,
<URL:http://www.obspm.fr/planets>,
<URL:http://techinfo.jpl.nasa.gov/WWW/ExNPS/HomePage.html>, and
<URL:http://ast.star.rl.ac.uk/darwin/> for more information.
 
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