kepler is a physical instrument. much like sometimes you see artifacts in pictures you take with an additional camera. astronomical telescopes are not that dissimilar, digital cameras with very nice lenss. just let you see artifacts in digital photography you would also see artifacts in cutler data so we do a certain job cleaning the data, make sure we are not obscuring the signal that we are looking for and we have to wait and actually wait for the signal to repeat and make sure it is fair. not only are we a step removed from not seeing the planet, but we also have to take a careful accounting of all the possible errors that might be there, all of the noise and might be in the signal and that determined if the plan is there that way. that is all the things that are going to happen to develop a list of what we call candidates. this is before you get to calling it a planet. candidate just means you see a certain number 8 you're pretty sure stars are getting dimmer on a regular basis and it looks like the dimming that

we didn't know any of this before kepler. we know that earth-like planetplanets are almost certaiy very common in the milky way. 15 years ago, we didn't even know there were planets at all around other stars. now we know earths are very common in the milky way. >> woodruff: what do they believe it's going to take to find out where those other earths are? >> well, so kepler's primary mission is often misunderstood. it wasn't specifically to find those planets in particular. it was to get an idea of how common they are. that's the basic mission. so if it found that earth-like planets are very rare, that tells astronomers, okay, maybe it's not worth going out now and trying to find specific ones. what it's found instead is that earth-like planets are probably very common. they're probably plenty of them reasonably close to us, and now we can start targeting, with new telescopes, targeting stars closer to earth, than the kepler stars which are quite far away, looking for those planets, and ultimately, with more powerful telescope

." >> brown: the kepler space telescope, once used to search for earth-like planets, is crippled, andn't be fixed. we explore its legacy and ask if it can still be used for scientific research. >> woodruff: under a pristine rain forest in ecuador lie more than 800 million barrels of oil. the country's president had asked the world to ante up in exchange for a promise not to drill, but that plan is being scrapped, as hari sreenivasan reports. >> brown: mark shields and david brooks analyze the week's news. >> ♪ just wishing i changed my ways... ♪ >> woodruff: and two men from two generations connected by a love of the blues are now collaborators on tour. we profile charlie musslewhite and ben harper. >> this is what the blues are supposed to do.. make you feel good. it's your comforter when you're down and your buddy when you're up. all purpose music. >> woodruff: that's all ahead on tonight's newshour. >> major funding for the pbs newshour has been provided by: >> bnsf railway. >> support also comes from carnegie corporation of new york, a foundation created to do what andrew carnegie

." >> brown: the kepler space telescope, once used to search for earth-like planets, is crippled, andn't be fixed.

kepler space telescope was a bit of a short timer turns out.was developed to look at earth-like planets among the stars. in may the pointing system broke down. that is not good. made it impossible to work through the solution. after working through a number about solutions the scientists at nasa said they were unable to fix it. that is it. a bit more space junk i guess will be out there in orbit. the voyager, 1 and 2 launched way back when we were little kids, gregg. gregg: right. martha: is still up there. still up there. gregg: some of these satellites last a whole lot longer than scientists ever expected which is tremendous. martha: it is further from the sun than pluto is from the sun of the so the whole length of the solar system, voyager 1 and 2 out there. that is great news. good try kepler. exactly. there is a lot of danger we've been covering out west. strong winds. dry heat out there that is just fueling these vicious wildfires that are raging now in 10 american states. have forced thousands of people out of their homes. gregg: outrag

she is a collaborator on the kepler mission which is, as you may know, has been probably the greatest mission for finding planets around ore stars -- other stars, has greatly expanded our view of the universe and the possibility of there being other earth-like planets out there. she's a fellow at the department of astrophysical scientists at princeton. and finally neil wiener who is professor of physics at nyu and is a theorist who among other things speaks about dark matter. and maybe you can -- i was trying to do this, i was trying to remember this number on the way over, that if you sort of hold up your hand, there's something like 10 million dark matter particles a second moving through your hand. >> >> well, i think that you're combining two different things. [laughter] you have a number, the number is accurate, but i think what he's alluding to, and i think it's worth keeping in mind as we start the discussion is that the universe is fantastically interesting, and one of the ways we're ignorant of it is that there is this huge dark sector out there which copies most of what the

he says one kid asked the robot about kepler's second law of plan torrey motion. kid was motivated to test the robot's knowledge. the experiment runs through next year. as far as these kids are concerned, the robot has already earned an a-plus. for "cbs this morning saturday"," lucy craft, kyoto. >> i want to go to that school. >> yeah. remember electricity? i love that his favorite food is electricity. >>> a major airline will pay one quarter of a million dollars. we el tell you why. your local news is next. for the rest of you stick around. you're watching "cbs this morning saturday." >>> i love the two of you today so i want people to have an understanding of gas monkey garage. tell us your idea. >> the original reason was there wasn't very many car shows so when i started gas monkey garage, the hope and the dream was to be where we're at now, have a show on discovery and we're very blessed to be where we're at. >> you met aaron and said what to him? how did you two meet, aaron? >> i was working at another hot rod shop kind of thing and did work for richard and

mine is going to have to do with the kepler spacecraft you've heard is malfunctioning, won't be able of the week is that it's going to be turned around to earth and turned to the national security agency so it can continue spying on america. >> we now know hillary clinton doesn't like voter id laws. her first speech was about voter id laws. she talked about the north carolina law there as greatest hits of voter suppression. it tells you how big -- five years talking about voting laws, big controversy in america. now it's one of the central issues of the democratic party. how do we make it easier for people, particularly min ors. the fact she gave her first speech about that tells you how big an issue it is. >> hillary on voting rights, biden's bus tour, feeling like 2016. want to thank my guests, bob frankieing, perry bacon, jr., thank you for getting up and for joining us. back here next weekend saturday and sunday 8:00 a.m. eastern time. guests will be lizz winstead. joey reed sid sitting in today. melissa harris-perry with joey reid coming up next and we'll see you next week here