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To operate in the coldest and darkest conditions to see the most distant stars. for the first time, we'll be able to see all the way back to the time when these very first galaxies formed. and that will allow us to actually get images of them, verify that they are the very first galaxies, and then we can study how galaxies have evolved over the history of the universe. the telescope could also offer a giant leap in our search for life, offering a close—up look at distant worlds beyond our own solar system. webb will also be able to probe the atmospheres of planets around other stars, with fa...

System. they say all of these exo-planets could have liquid water on their planets, the key to potentially supporting life. but scientists say three are in the habitable zone, meaning conditions there are best for life like that on earth. >> we've made a giant accelerated leap forward in the search for habitable worlds and life on other worlds. >> finding a second earth is not just a matter of if but when. >> reporter: nasa says all of the planets in trappist 1 are likely to be rocky and more observation is needed to learn if they have water underground or on the surface. now the problem is ge...

Our viewers here in the united states and all around the world. i'm rosemary church. >> and i'm cyril vanier. your headlines this hour. republicans lawmakers are facing angry constituents at town hall meetings across the country. people are asking about health care, education, the environment, and washington's relationship with russia. at some meetings, the crowds have shouted down their representatives. two senior u.s. officials are in mexico to try to patch up strained relations. in a few hours, u.s. secretary of state rex tillerson and homeland security secretary john kelly will sit dow...

>> be easy on my solar system, man. the end game would be, so if i look at the conversation that you're driving with "first contact," i look at the conversation that richard branson is driving with commercialization of space flight, the final frontier, forgive would be some kind of quantum travel mechanism. right now we can't travel in outer space in any kind of consequential way? >> absolutely not. and i'm not sure we will in a long time, but that doesn't mean that we can't through seti or different kind of ways determine that there are people out there or life forms out there. and also, we c...