Comet Half News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Continue. but no one is questioning the fact that the internet and social media are now playing a critical role in u.s. foreign policy. jessica? >> fast nating shift. thanks, jill. a celestial meeting could shed light on space secrets. nasa's spacecraft "stardust" had a close encounter with a comet half the size of new york city. let's get more from john zarrella. >> nasa doomed this as the stardust spacecraft. 200 million miles from earth. we don't have to worry bt it coming near earth. but what happened is nasa was looking at traffic images coming down through the course of the day as star d...

And re-evaluation by the end of 2012. >> reporter: what do you say to a patient who has to have an artificial hip removed because that product wasn't safe? >> not every single patient is going to have a perfect experience with that device. and that's unfortunate. we're striving to make devices as safe as possible. >> the patients with those faulty devices, it means having a second operation to replace the bad part with a good one. the universe is sending us a valentine of its own. a comet half the size of manhattan sped by a nasa spacecraft monday night. scientists clapped when they received...