This is really cool stuuf
In 20 years school kids will not be taught just the "9 planets" but about hundreds, thousands, some perhaps even earthlike.
Beyond 2015, very ambitious space (Darwin/TPF) and ground (OWL) experiments
are targeting direct detection of nearby Earth-mass planets in the habitable
zone and the measurement of their spectral characteristics. Beyond these, `Life
Finder' (aiming to produce confirmatory evidence of the presence of life) and
`Earth Imager' (some massive interferometric array providing resolved images of
a distant Earth) appear as distant visions.
Space will be an even more interesting place for future generations than it is for ours.