we depend on the light taking a long time to travel. we can't see. we never had the tool before to see this far, so this is special. that's where i think we'll get big surprises. i think we could also get big surprises about planets. we'll be looking at planets around other stars. we know many of them are there but they're still hard to study. we're looking to see do they have things that make them a little bit like home. are they the right size, the right temperature. do they maybe have an atmosphere with water? all of those could be interesting surprises. we could turn out to be special and alone or one of many places where life might be. >> when do you hope to get some of those answers? when do you think we'll start cleaning data from webb? >> we take six months after launch before we're really ready to take scientific pictures. we have to adjust the telescope, focus it, verify all the commands work on the instruments, make sure everything is working properly and we know how to operate it.