researchers now believe part of it may have survived, if i can get my lips to work. cnn pete meet, jennifer gray is here with more amazing pictures on this event. this thing is really cool. it has science geeks like me really jazzed up about it. it took a trip around the sun yesterday. we are crossing our fingers hoping it survived. we have been watching this for more than a year. it has been traveling for more than 4 million years. >> which is incredible. we are really hoping it survived. the nucleus of it is three to four miles across. the tail is bigger or wider than australia. so this thing is just gigantic. >> is that why it is so unique, because of the size of this monster. >> well, for many years it is unique. they are calling it the comet of the century. it is the brightest comet that we are supposed to see in the last 50 years. we can learn so much about this. it is unique, because it is called a sun grazer.