>> you took at photograph. when did you take it? >> 6:00 this evening. this thing appears to be seven times larger than the earth and my heart beats faster. >> and the nenxt day he gets another call. he and his students claim there is a very large object following halebopp comet. >> what the hell is that? >> it's approximately four times the size of the planet earth and it's headed our way. >> to the members, this is important for a couple of ideas. one is the number of ideas theof the spaceship they're going to go on to is really, really big. >> the hale bopp comet was part of the decision to do something now. why now 1999? >> team bell from the beginning were very tuned in to the significance of celestial event