Dr. Sten Odenwald
Dr. Sten Odenwald is a retired astronomer and educator formerly with the National Institute of Aerospace and NASA, who also runs an online resource called The Astronomy Cafe. He received his PhD in astrophysics from Harvard University in 1982. He is an active science popularizer and book author, and has a number of websites promoting science education and mathematics: The Astronomy Café and SpaceMath@NASA. He has also appeared on National Geographic TV specials and a number of YouTube video productions. His latest article 'String Theory' appeared in Astronomy magazine, and 'Preparing for a Solar Superstorm' in Scientific American.