"ivk" wrote in message
...
I think Kepler has downloaded about 5 months of observations. This
would mean that they should've dicovered planets with rotation period
of 1.5 momths (about half of Mercury's), if there were any new ones.
Does it mean that there actually very few extrasolar planets out
there ?

Please note that planets with short rotation period are more likely to
have their orbital plane inclined in the right way for Kepler to
discover them than planets with longer periods. So it seems that it
will be even less likely that they will discover any planets in the
habitable zone, now that they have not discovered any planets with
1.5 month period. Does it sound right ?

Algol's planet "Androcles" has a period of 70 hours. It's beyond the range
of Kepler, though. Besides, do you expect a result for just one orbit
if other planets are involved? That would be magic.
http://www.androcles01.pwp.blueyonde...lgol/Algol.htm
--Androcles