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 100 planets discovered since 1996   See http://exoplanets.org/ • Tend to be big (Jupiter) and very close to star    (easier to see)