Greg Redfern, known on twitter as "@SkyGuyinVA," has been an adjunct professor/instructor of astronomy for five different colleges since 1984. As a NASA JPL Solar System Ambassador since 2003, he has shared NASA's missions to the solar system with many audiences in person as well as on air with Voice Of America (VOA) International, Fox 5 WTTG TV, NBC4 Washington, CBS News and WJLA7. Since 2006, he has been the space reporter for WTOP Radio and WTOP.com.

Greg's daily astronomy blog, "What's Up?: The Space Place" has had over 2.9 million views from around the world. As a writer, he has authored numerous articles forSky and Telescope,Meteorite Magazine,Skywatch and a number of newspapers, includingGannetandUSA Today.

Greg has been observing and photographing the sky for over five decades and collecting meteorites for years. He has used telescopes of all kinds and visited observatories, NASA facilities, and geological sites all over the world. His astrophotographs have appeared online on NASA.gov, MSN.com, the Huffington Post, the Washington Post, Earth and Sky.org, The Planetary Society, Space.com, Universe Today, and other online publications. For years, cruise ship guests and visitors to Shenandoah National Park have enjoyed Greg's presentations, where he mingles the folklore and science of the stars.