Chris Vaughan, aka @astrogeoguy , is a geophysicist and lifelong amateur astronomer based in Toronto, Canada. He is an active member of the Royal Astronomical Society of Canada, and an operator of the historic 74˝ telescope at the David Dunlap Observatory. Highly active in science public outreach and education, he frequently organizes local star parties and sidewalk solar astronomy sessions, and regularly delivers presentations about astronomy, and earth and planetary science, to students and the public. For more than three years, he has published Astronomy Skylights, a weekly newsletter which is accessible through Tumblr, Facebook, and Google+. He writes the Mobile Stargazing column for in cooperation with SkySafari software .