Extra-Solar Planets
Hard to see faint planet right next to very bright star
Two indirect techniques available
(Like a binary star system but where 2nd “star” has extremely low
mass)
Watch for Doppler “wobble” in position/spectrum of star
Watch for “transit” of planet which slightly dims light from star
About 110 planets discovered since 1996   See http://exoplanets.org/
Tend to be big (Jupiter) and very close to star    (easier to see)