Carl Sagan

Carl Sagan was a prominent astronomer, astrophysicist, science communicator, author, cosmologist, astrobiologist, and science popularizer in astronomy and natural sciences, hailing from America. He was born on November 9, 1934, in Brooklyn, New York, United States; and died on December 20, 1996. Author Sagan was popular for his contributions in the research works of the extraterrestrial life. One of his important research work includes the experiment involving the amino acid production from the basic chemicals through radiation. He was even involved in the assembling of the first messages that were sent into the space: the Voyager Golden Record and he Pioneer Plaque. These were the universal messages which had the potential of being understood if found by any extraterrestrial intelligence. During his time, author Sagan continuously argued on the topic of the hypothesis that the Venus’s surface temperature can be calculated with the help of the greenhouse effect.