An experienced special education teacher, Greg Gerkens taught science for five years in the Wyandanch Union Free School District in New York. There, Greg Gerkens helped children with different needs to understand concepts from many different areas of science, including astronomy.
The first major shift in planetary definition to impact the public consciousness occurred in 2006, when the International Astronomical Union released an official statement, which said that to be a planet, a celestial body must orbit the sun, clear the area around the orbit, and be massive enough to maintain a nearly round shape. Under this definition, the former planet Pluto was demoted to dwarf planet status.
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