Philip Cary Plait (born September 30, 1964), also known as The Bad Astronomer, is an American astronomer, skeptic, and popular science blogger. Plait has worked as part of the Hubble Space Telescope team, images and spectra of astronomical objects, as well as engaging in public outreach advocacy for NASA missions. He has written three books, Bad Astronomy, Death from the Skies, and Under Alien Skies. He has also appeared in several science documentaries, including How the Universe Works on the Discovery Channel. From August 2008 through 2009, he served as president of the James Randi Educational Foundation. Additionally, he wrote and hosted episodes of Crash Course Astronomy, which aired its last episode in 2016.
Plait's work has also appeared in the Encyclopædia Britannica Yearbook of Science and the Future and Astronomy magazine. He is also a frequent guest on the SETI Institute's weekly science radio show Big Picture Science.
Plait has contributed to a number of television and cinema productions, either onscreen as host or guest or in an advisory role offscreen. He hosted the three-part documentary series "Phil Plait's Bad Universe" on the Discovery Channel, which first aired in the United States on August 29, 2010 but was not picked up as a series. He has appeared in numerous science documentaries and programs including How the Universe Works. Plait was a science advisor for the 2016 movie Arrival and the 2017 CBS TV Series Salvation. He was the head science writer of the 2017 show Bill Nye Saves the World on Netflix.
