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Jon: gazing up at the sky is only able to dream of what secrets of mars might hold now thanks to nasa those dreams might get some answers. the insight land are set to touch down on mars to afternoon to begin probing what is going on deep beneath the planet surface how important is this mission and how might it help us here on earth? joining us as chief astronomer director of the planetarium at the franklin institute science museum in philadelphia. good to have you on so how confident are you they can put this on mars tomorrow? . >> well, this is a very difficult thing to do landing a spacecraf...

Spacecraft that will really data for really data from inside as it prepares to interest the planet's atmosphere. the landing happening 91 million miles from earth at the most crucial moments will happen in less time than it takes to hard boil an egg. the thin atmosphere using rocket and deploy parachutes to slow down. use retro rockets to study the landing. nasa says one obstacle could be dust forming on the planet surface. >> really intriguing destination for that purpose as well trying to really understand what those conditions were like 4 billion years ago. did life actually began on mars o...

A single day on the moon exposes you to as much radiation as three years on earth and a month the dose is the same as a life time on our planet surface that makes cancer a big risk for astronauts that's why the orion capsule as a thick layer of water tanks built into its walls to protect the travelers in space . three d. printers could potentially turn moon rock into protective walls and build buried stations into the moon's surface. but they're still just elaborate constructions that only exist in the imagination of the next moon landing is still far off for yet another reason. computing need...

Nasa's kep lar's spacecraft has spotted a planet that is bigger and older. >> for more on this interstellar discovery, here is our joe. >> hello, earth, this is your long lost cousin in the sear. for a world like ours a break through for star gazers from a galaxy far far away. this is kep lar 452 b. distant relative a little larger, 60% bigger to be exact and more than a billion years older. but it's the distinct similarities between these planets which have nasa scientists extremely excited. it is located within the so-called habitable zone. just like our planet it sit in the area around a su...

Hydro again, phosphorus and carbon. if you remember back in your science classes from high school, those are the building blocks of life, not only that, but the rock has the same makeup that supports life here on earth. nasa says and i'm quoting out of the study, a fundamental question of this mission is if mars could have supported a habitable environment and the answer they say is yes. i mean, curiosity, as now, landed seven months ago and it's there for a two year mission and might be longer, if the batteries last longer. it found water in different part of the planet just a couple months a...