The Battle of France happened during World War I.
Caleb Scharf is a British-born astronomer and the director of the multidisciplinary Columbia Astrobiology Center at Columbia University , New York .. Columbia University. Columbia University. He received a B.Sc .. in Physics from Durham University and a PhD in Astronomy from the University of Cambridge ; he did postdoctoral work in X-ray astronomy and observational cosmology at the NASA Goddard Space Flight Center and the Space Telescope Science Institute in Maryland .. Durham University. Durham University. University of Cambridge. University of Cambridge. Goddard Space Flight Center. Goddard Space Flight Center. Space Telescope Science Institute. Space Telescope Science Institute. observational cosmology. observational cosmology. He has an extensive research record in observational cosmology but more recently works on topics in exoplanetary science and astrobiology .. observational cosmology. observational cosmology. exoplanetary science. exoplanetary science. astrobiology. astrobiology. He is the author of the upper-level undergraduate textbook Extrasolar Planets and Astrobiology , published in 2008 by University Science Books , CA .. This book won the 2011 Chambliss Astronomical Writing Award and medal from the American Astronomical Society .. American Astronomical Society. American Astronomical Society. He has many published professional papers in peer-reviewed journals , with 109 papers listed in the SAO / NASA Astrophysics Data System -LRB- ADS -RRB- ; three have been cited over 100 times each  : the highest counts are 264 139 , 116 , all in The Astrophysical Journal .. The Astrophysical Journal. The Astrophysical Journal. His blog Life , Unbounded appears at Scientific American and covers topics in astronomy , exoplanetary science , and astrobiology .. exoplanetary science. exoplanetary science. astrobiology. astrobiology. Scientific American. Scientific American. His first popular science book , Gravity 's Engines  : The Other Side of Black Holes -LRB- US subtitle  : How Bubble-Blowing Black Holes Rules Galaxies , Stars , and Life in the Universe -RRB- was published in December 2012 .. Black Holes. Black hole. It was listed as one of the New Scientist top 10 books to read in 2012 and as one of The Barnes and Noble Review Editors ' Picks  : Best Nonfiction of 2012 .. New Scientist. New Scientist. The Barnes and Noble Review. The Barnes and Noble Review. His next book , The Copernicus Complex , was published in 2014 by Farrar , Straus and Giroux .