Greg Redfern has been an adjunct professor/instructor of astronomy for five different colleges since 1984. A NASA/JPL Solar System Ambassador since 2003, he has shared NASA's missions with audiences in person as well as on television and radio outlets in the Washington D.C. media market. Greg's daily astronomy blog, What's Up?: The Space Place has had over 3.74 million visits from around the world. As a writer Greg has authored feature articles for a number of magazines, newspapers and authored two books. Greg has been observing and photographing the sky for over five decades and collecting meteorites for years. He's used telescopes of all kinds and visited observatories, NASA facilities, and geological sites. As a result, Greg has brought the wonder, beauty and excitement of our universe to audiences in a one-on-one style that resonates with his passion and knowledge. Cruise ship guests have truly enjoyed Greg's presentations as well as viewing the night sky at sea where he mingles the folklore and science of the stars.