is the initial stage of the project, because it was heavily commemoration-based, inevitably you're goign to get primarily former students and then some faculty. now, we still did collect those and we did collect interviews during the big commemorations like the 35th and then the 40th, which was the last one i attended in 2010, but we also wanted to collect a wide variety of interviews, which we did just kind of informally throughout each year. and so as a result, we cast a bit of a wider net. so, for example, during that five-year period, we interviewed two former presidents of kent state university, michael schwartz and carol cartwright. also interviewed several citizens of the kent community whose voices really had not been heard, they had really not been interviewed that much either. and a member of black united students who eventually became president of b.u.s. after may 4, i think around 1971 and also two members of the ohio national guard as well. we also wanted to have a wider time frame, and by what i mean by that is this. a lot of times when people look at may 4 they focus speci

by using helioseismology, you can reconstruct the -- reconstruct what was goign on in -- going on insidethe sun is quite stable. astronomers call it the solar constant. we are now close to 2000 candidates. one of the interesting questions as the search goes on for the possibility of life on other planets will be, do you only find life on planet that orbit very stable stars like the sun, or are there more wildly variable stars with planets as well? host: bob, go ahead. journal@c-span.org caller caller: could use begun how the sun was -- could you speak on the physical dimensions of the sun? can you relate it in our terms, like 100 diameters of the earth, that sort of thing? guest: the sun has a diameter of 110 earths. it used to be that only astronomers could see this with very fancy and expensive telescopes, with marvelous solar processes. the magnetic field lines -- the sun is made of plasma. that is what you get when you strip adams down to their constitutional -- strip atoms down to their constitutional elements, protons, neutrons. it is 330,000 times the mass of the earth. you can no

we are going to take a short break and then i am goign tng to come back. 30 seconds. this is a townhall. this is a townhall discussion. webcast.v eoe on the c-span is taping us tonight. we want tto thank all of the social media, twitter foll owers. let's give them a hand. if you will, do not leave. stand at ease for 30 seconds. we must occupy the vote. let me very proudly ask you to put your hands together for mr. jeff johnson. jeff johnson, raise your hand. he is our floor moderator. we are proud that he is back with us for yet the second year in a row. it is my honor to introduce our panelists. first, the blogger me keli goff. she is on msnbc every monday. give her a hand. the activist and writer, mr. kevin powell. the president and ceo of the urban league of greater new orleans, our host for the 2012 urban league's annual conference, and nolan rollins. the dean of the school of education right here at howard university, dr. leslie. the activist and a radio host, at the truth stare, war and -- the truth sayer, warren ballentine. i will have to do this by memory. the